National Research Council (U.S.). Committee to Review the U.S. Geological Survey's Mineral Resources Program & ebrary, Inc. (2003). Future challenges for the U.S. Geological Survey's Mineral Resources Program. National Academies Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)National Research Council (U.S.). Committee to Review the U.S. Geological Survey's Mineral Resources Program και Inc ebrary. Future Challenges for the U.S. Geological Survey's Mineral Resources Program. Washington, D.C.: National Academies Press, 2003.
Παραπομπή σε μορφή MLA (9th εκδ.)National Research Council (U.S.). Committee to Review the U.S. Geological Survey's Mineral Resources Program και Inc ebrary. Future Challenges for the U.S. Geological Survey's Mineral Resources Program. National Academies Press, 2003.