Geological Survey research, fiscal year 1981 :
a summary of recent significant scientific and economic results accompanied by a list of geologic, hydrologic, and cartographic investigations in progress.
|Corporate Author:||Geological Survey (U.S.)|
Washington, D.C. : U.S. G.P.O., 1984.
Geology > Geology / Research > Geology / Research / United States.
Geology > Geology / United States.
vii, 424 p. ;
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||University of California|