The essentials of mental measurement / William Brown, and Godfrey H. Thomson. Mental measurement. Brown, William. 1811- Thomson, Godfrey Hilton, Sir, 1881-1955, joint author. Psychophysiology. 151.2 BRE "First edition 1911 (by W. Brown) ... fourth edition 1940." "References" at end of chapters xiii-xv. Cambridge : The University press, 1940. 1940. 1940 Text ix, 256 p. ; eng The Cambridge psychological library