Group tests of intelligence / by Philip Boswood Ballard.

London ; New York : Hodder and Stoughton, 1923.

x, 252 pages : illustrations ; 19 cm

[2nd ed.].

Includes bibliographic footnotes and index

This edition was reprinted in 1925.

Copy 1 Supplier/Donor: Poly of East London Note: 1925 printing. Formerly in the Charles Myers Library at the N.I.I.P

Copy 3 Note: From the Eugenics Society. 1923 printing