APA

Commonwealth Mining and Metallurgical Congress (7th : May 1. . N. R. S., Watts W. G. & Institution of Mining and Metallurgy. Northern Rhodesia Section. (1961). Commemorative programme. Kitwe: Northern Rhodesia Section on the Seventh Commonwealth Mining and Metallurgical Congress.

Chicago

Commonwealth Mining and Metallurgical Congress (7th : May 1961 Northern Rhodesia Section), Watts W G and Institution of Mining and Metallurgy. Northern Rhodesia Section. 1961. Commemorative programme. Kitwe: Northern Rhodesia Section on the Seventh Commonwealth Mining and Metallurgical Congress.

Harvard

Commonwealth Mining and Metallurgical Congress (7th : May 1. . N. R. S., Watts W. G. and Institution of Mining and Metallurgy. Northern Rhodesia Section. (1961). Commemorative programme. Kitwe: Northern Rhodesia Section on the Seventh Commonwealth Mining and Metallurgical Congress.

MLA

Commonwealth Mining and Metallurgical Congress (7th : May 1961 Northern Rhodesia Section), Watts W G and Institution of Mining and Metallurgy. Northern Rhodesia Section. Commemorative programme. Kitwe: Northern Rhodesia Section on the Seventh Commonwealth Mining and Metallurgical Congress. 1961.