APA

Commonwealth mining and metallurgical congress, . (1970). Proceedings of the minth Commonwealth mining and metallurgical congress 1969. London: The institution of mining and metallurgy.

Chicago

Commonwealth mining and metallurgical congress, . 1970. Proceedings of the minth Commonwealth mining and metallurgical congress 1969. London: The institution of mining and metallurgy.

Harvard

Commonwealth mining and metallurgical congress, . (1970). Proceedings of the minth Commonwealth mining and metallurgical congress 1969. London: The institution of mining and metallurgy.

MLA

Commonwealth mining and metallurgical congress, . Proceedings of the minth Commonwealth mining and metallurgical congress 1969. London: The institution of mining and metallurgy. 1970.