James M. Robertson and Ronald F. Broadhead, project directors ; Anthony W. Gorody, contract manager, Gas Research Institute ; Carol A. Hjellming, project editor
Commission for the Geological Map of the World, Ministery of Mines and Energy, National Department of Mineral Production (Brazil), with the collaboration of Unesco ; co-ordinator general, Fernando Flávio Marques de Almeida ; [translation from the Spanish text by Frances Delany]
compiled by Grant Mossop and Irina Shetsen ; published jointly by the Canadian Society of Petroleum Geologists and the Alberta Research Council in sponsorship association with the Alberta Department of Energy and the Geological Survey of Canada