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1

Aeromagnetic map of parts of Clay and Becker Counties, Minnesota /

Aeromagnetic map of parts of Clay and Becker Counties, Minnesota /

by Anderson, Lennart A., 1926-
Washington, D.C. : The Survey, 1963

Government Document Map

2

Aeromagnetic map of Berwick quadrangle, Maine and New Hampshire : total intensity relative to arbitrary datum /

Aeromagnetic map of Berwick quadrangle, Maine and New Hampshire : total intensity relative to arbitrary datum /

by Bromery, Randolph W. (Randolph Wilson), 1926-2013
Washington, D.C. : U.S. Geological Survey, 1956

Government Document Map