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Directory of geoscience libraries, U.S. and Canada.

APA Citation

Walker, R. D. (Richard Dean). (1968). Directory of geoscience libraries, U.S. and Canada. [Beaumont? Tex.]: Geoscience Information Society.

Walker, Richard D. (Richard Dean), 1930-. Directory of Geoscience Libraries, U.S. And Canada. [Beaumont? Tex.]: Geoscience Information Society, 1968.

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