Bennett, H.H.
Soil conservation goes to war - Toronto-CA : Royal canadian institute, 1943. - páginas 26-30 : Ilustraciones blanco y negro - Irregular - Vol. VIII, no.III (1942-1943) - Proceedings of the Royal Canadian Institute ; no.III . - Royal Canadian Institute. .
Soil conservation goes to war - Toronto-CA : Royal canadian institute, 1943. - páginas 26-30 : Ilustraciones blanco y negro - Irregular - Vol. VIII, no.III (1942-1943) - Proceedings of the Royal Canadian Institute ; no.III . - Royal Canadian Institute. .