Text ( visual ) : unmediated The abilities of man : their nature and measurement / by C. Spearman. -- London : Macmillan , 1927. -- viii, 415, xxxiii p. : ill. ; 23 cm. -- Includes index. -- (BA16808941) ; https://ci.nii.ac.jp/ncid/BA16808941 Author Heading(s): Spearman, Charles Edward