Line, William.
Aptitude test and their application in wartime - Toronto-CA : Royal canadian institute, 1943. - páginas 41-43: Ilustraciones blanco y negro - Irregular - Vol. VIII, no.III (1942-1943) - Proceedings of the Royal Canadian Institute ; no.III . - Royal Canadian Institute. .
Aptitude test and their application in wartime - Toronto-CA : Royal canadian institute, 1943. - páginas 41-43: Ilustraciones blanco y negro - Irregular - Vol. VIII, no.III (1942-1943) - Proceedings of the Royal Canadian Institute ; no.III . - Royal Canadian Institute. .
