Worldwide directory of national earth-science agencies and related international organizations /
compiled by Wenonah E. Bergquist [and others].

APA Citation

Geological Survey (U.S.)., Bergquist, W. E. (1981). Worldwide directory of national earth-science agencies and related international organizations. Reston, Va.: U.S. Geological Survey.

MLA Citation

Geological Survey (U.S.), and Wenonah E Bergquist. Worldwide Directory of National Earth-science Agencies And Related International Organizations. Reston, Va.: U.S. Geological Survey, 1981.

Warning: These citations may not always be complete (especially for serials).