by Donald W. O'Connell . by William E. Dunkman . by Albert Gailord Hart . by Albert Rees . by Boris Shishkin . by D. Gale Johnson . by Donald H. Wallace and Marver H. Bernstein . by Frederick C. Mills . personal observation by Edward H. Collins ; prepared for use as the basis of discussion by the American AssemblyUniversity Microfilms International[1984]