The national hydrologic bench-mark network /
by Ernest D. Cobb and J.E. Biesecker.

APA Citation

Cobb, E. D., Biesecker, J. E., Geological Survey (U.S.). (1971). The national hydrologic bench-mark network. Washington: U.S. Dept. of the Interior, Geological Survey.

MLA Citation

Cobb, Ernest D, James E. Biesecker, and Geological Survey (U.S.). The National Hydrologic Bench-mark Network. Washington: U.S. Dept. of the Interior, Geological Survey, 1971.

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