Evansville Vanderburgh Public Library

Progress report on selected geophysical activities of the United States, 1973-76, a quadrennium of cooperation and progress : for presentation to the III Pan American Consultation on Geophysics, Quito, Ecuador, August 15-20, 1977, submitted by the United States member of the Commission on Geophysics of the Pan American Institute of Geography and History ; edited by James N. Jordan and Kendall L. Svendsen