G. Petursson and Rikke Hoff-J0rgensen The concept of slow viral infections was first put forward in 1954 by Dr. Bjorn Sigurdsson, an Icelandic physician who had been studying some sheep diseases which were introduced into Iceland with the importation of a foreign breed of sheep in 1933. Sigurdsson's main criteria for defining slow infec tions were a very long initial period without clinical signs lasting months or even years following infection and a rather regular protracted, progres sive course, once clinical symptoms had appeared, usually ending in serious disease or death. Sigurdsson included in this list of slow infections maedi -visna, infectious adenomatosis of sheep, scrapie in sheep, Bittner's mam mary carcinoma and Gross' leukemia in mice. All of these diseases, except scrapie, are caused by retroviruses. The characteristics of slow infections as described above are of prac tical importance for epidemiology, diagnosis and control of these diseases. For many years the slow infections remained primarily a veterinary problem, mainly affecting sheep and goats in certain countries. In recent years, how ever, the human immunodeficiency virus (HIV) causing acquired immunodefici ency syndrome (AIDS), has suddenly appeared in many countries of the world and brought the slow infection concept forcefully to the attention of the medical profession. The disease problems and the economic effects of slow infections of sheep and goats are increasingly recognized in various coun tries. For the reasons stated above we feel that this book should be useful for veterinarians and physicians alike."

Crisis Education and Service Program Designs, 2nd ed, is a guide to educators, administrators, and clinical trainers who may otherwise feel ill-prepared to teach crisis theory and practice. It provides a framework for more systematic inclusion of crisis content (e.g. critical life events, violence, victimization, suicide and psychiatric emergencies) in the formal preparation of health and human service professionals. Further, it offers criteria for developing programs and practice protocols that balance attention to the psychosocial and biomedical needs of people in distress and crisis. By clearly delineating what crisis care is and is not, the revised Crisis Education and Service Program Designs shows that this facet of mental health care is neither a mere "band-aid" (as previously thought) nor a panacea for what ails the healthcare system. Instead, it is an essential element of the total health-service delivery system that recognizes the whole human being, not only his or her medical or psychiatric diagnosis. Readers will find that this book fills the current gaps in knowledge and training; contributes to a more holistic practice by all human service professionals; and shows educators and practitioners how to adopt a nondual approach to working with trauma survivors' minds and bodies.

G. Petursson and Rikke Hoff-J0rgensen The concept of slow viral infections was first put forward in 1954 by Dr. Bjorn Sigurdsson, an Icelandic physician who had been studying some sheep diseases which were introduced into Iceland with the importation of a foreign breed of sheep in 1933. Sigurdsson's main criteria for defining slow infec tions were a very long initial period without clinical signs lasting months or even years following infection and a rather regular protracted, progres sive course, once clinical symptoms had appeared, usually ending in serious disease or death. Sigurdsson included in this list of slow infections maedi -visna, infectious adenomatosis of sheep, scrapie in sheep, Bittner's mam mary carcinoma and Gross' leukemia in mice. All of these diseases, except scrapie, are caused by retroviruses. The characteristics of slow infections as described above are of prac tical importance for epidemiology, diagnosis and control of these diseases. For many years the slow infections remained primarily a veterinary problem, mainly affecting sheep and goats in certain countries. In recent years, how ever, the human immunodeficiency virus (HIV) causing acquired immunodefici ency syndrome (AIDS), has suddenly appeared in many countries of the world and brought the slow infection concept forcefully to the attention of the medical profession. The disease problems and the economic effects of slow infections of sheep and goats are increasingly recognized in various coun tries. For the reasons stated above we feel that this book should be useful for veterinarians and physicians alike."

Including recent advances and historically important catalysts, this book overviews methods for developing and applying polymerization catalysts - dealing with polymerization catalysts that afford commercially acceptable high yields of polymer with respect to catalyst mass or productivity. - Contains the valuable data needed to reproduce syntheses or use the catalyst for new applications - Offers a guide to the design and synthesis of catalysts, and their applications in synthesis of polymers - Includes the information essential for choosing the appropriate reactions to maximize yield of polymer synthesized - Presents new chapters on vanadium catalysts, Ziegler catalysts, laboratory homopolymerization, and copolymerization