Principal facts for gravity observations in Harold D. Roberts Tunnel, Colorado and the effect of isostasy - Plouff, Donald; Geological Survey (U.S.) ([Reston, Va.?] : U.S. Dept. of the Interior, Geological Survey, 1985)
Distributed to depository libraries in microfiche.
Bibliography: leaves 8-9.
Microfiche.
Keywords: Gravity -- Colorado