The original AO/ASIF Instrumentation manual presented a concise and complete description of the AO instruments. Thoughtfully developed by Fridolin Sequin and Rigmor Tex hammar, the manual discussed in a clear fashion the purpose and care of the various AO instruments that are handled by the operating room staff. One important feature of the first edition was a detailed checklist of the instruments required for the more common operative procedures for treating fractures. Fridolin Sequin was well-suited to author the first edition: his 15 years of experience as a technical engineer for the AO gave him in-depth knowledge of AO instruments, and he drew on the clinical knowledge of Rigmor Texhammar, a consultant and di rector of the AO courses for nurses. Its original feature of com bining a column of text with a column of illustrations meant the manual quickly became accepted as a standard. By 1981, trans lations could be found in English, French, Spanish, and Italian. Not surprisingly, the manual was very popular."

Based on a novel class scheme and a unique compilation of German and American data, this book reveals that intergenerational class mobility increased over most of the past century. While country differences in intergenerational mobility are surprisingly small, gender, regional, racial and ethnic differences were initially large but declined over time. At the end of the 20th century, however, mobility prospects turned to the worse in both countries. In light of these findings, the book develops a narrative account of historical socio-political developments that are likely to have driven the basic resemblances across countries but also account for the initial decline and the more recent increase in intergenerational inequality.