Oil in the mackenzie valley.
Lloyd, Trevor.
Oil in the mackenzie valley. - New York-US : Geografical record, 1944. - páginas 275-307 : Ilustraciones blanco y negro - Irregular - Vol. XXXIV, no. 2(Apr. 1944) - The Geographical Review ; no. 2 . - The Geographical Review. .
Oil in the mackenzie valley. - New York-US : Geografical record, 1944. - páginas 275-307 : Ilustraciones blanco y negro - Irregular - Vol. XXXIV, no. 2(Apr. 1944) - The Geographical Review ; no. 2 . - The Geographical Review. .