Contributing Authors Include Otto Struve, John Langston, H. W. Dusinberre, Edwin Beito, Samuel Herrick, L. F. Banks, And E. S. Quilter.

Contributing Authors Include Samuel Herrick, John C. Bellamy, Charles DeVore, Walter Wrigley, And G. A. Long, Jr.

Contributing Authors Include W. B. Klemperer, E. S. Quilter, Charles W. Handley, Alton Moore, Paul E. Wylie, And K. R. Greenaway.

Contributing Authors Include Douglas H. Ewing, Walter Hadel, Robert Katz, John Knaul, And Harold Beck.

Contributing Authors Include John P. Snyder, R. S. Damon, Frederick Franklin, Charles Smiley, Vernon I. Weihe, Ph. A Gallas, John W. Calvert, And G. R. Tatum.

Contributing Authors Include J. H. Dellinger, Charles H. Smiley, Horace R. Byers, And E. S. Quilter.

Contributing Authors Include Edwin A. Beito, Walter Zimmerman, Charles T. Dozier, D. E. McKay, Marvin Greenberg, And Paul Miller.

Contributing Authors Include Gordon G. McLintock, Harold C. Stuart, Jack Taylor, M. C. Young, D. M. Harvey, G. P. Disosway, Gordon Gray, Lewis A. Pick, F. A. Heileman, And Many Others.

Contributing Authors Include John P. Snyder, R. S. Damon, Frederick Franklin, And Many Others.

Contributing Authors Include Paul Rosenberg, Vernon I. Weihe, John D. Kay, Alton B. Moody, W. S. Ivans, Jr., And Allan K. Ohashi.

Contributing Authors Include Paul Rosenberg, Charles H. Smiley, Robert H. Randall, Jr., Randolph E. Tyrrel, P. V. H. Weems, Eric J. Isbister, John W. Busby, Ralph F. Clark, W. F. Griswold, George W. Petrie, Roy W. M. Graham, C. W. Davis, A. N. Black, And F. Y. Craig.