Text ( visual ) : unmediated The nature of "intelligence" and the principles of cognition / by C. Spearman. -- London : Macmillan , 1923. -- viii, 358 p. ; 23 cm. -- Includes index. -- (BA4057878X) ; https://ci.nii.ac.jp/ncid/BA4057878X Author Heading(s): Spearman, Charles Edward