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]
[consejo de redacción--director general, Gladstone Oliva Gutiérrez; redactores temáticos principales, José R. Hernández Santana ... and others ; redactores cartográficos principales, Antonio C. Lorenzo Rodríguez ... and others]