Group tests of intelligence / by Philip Boswood Ballard.

Toronto ; London : Hodder and Stoughton, [1922]

x, 252 pages : illustrations ; 19 cm

Includes bibliographic footnotes and index

Copy 1 Supplier/Donor: Polytechnic of East London Note: Signature of C. Spearman on front endpaper. Formerly in the Spearman Collection of the Charles Myers Library at the National Institute of Industrial Psychology. Contains Charles Myers Library bookplate