Killin, A.F. Potash / A.F. Killin. - Ottawa : Dept. of Energy, Mines and Resources, 1977. - 7 p. : ill., maps ; 25 cm. - 1977 ; no. 37 . Subjects--Topical Terms: Potash -- Canada. Gov. Doc. Class. No.: G CAN E64 (08) 3/37