Robert Mearns Yerkes, Clarence Stone Yoakum
Army Mental Tests by Clarence Stone Yoakum (1879 - 1945) and Robert Mearns Yerkes (1876 - 1956)
Prepared in cooperation with the staff of the surgeon general's office as a source of information and printed materials concerning psychological testing used within the United States Army and indications of the possible use of similar methods in education and industry. - Summary by Leon Harvey