Association of Geoscientists for International Development & Ricaldi, V. H. (1978). Directory of geoscience departments in universities in developing countries: 1977. Association of Geoscientists for International Development.
Cita Chicago (17th ed.)Association of Geoscientists for International Development i Victor Hugo Ricaldi. Directory of Geoscience Departments in Universities in Developing Countries: 1977. St. John's, Newfoundland: Association of Geoscientists for International Development, 1978.
Cita MLA (8th ed.)Association of Geoscientists for International Development i Victor Hugo Ricaldi. Directory of Geoscience Departments in Universities in Developing Countries: 1977. Association of Geoscientists for International Development, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.