Precambrian basement map of the northern midcontinent, U.S.A. a digital representation of the 1990 P.K. Sims map /

[Reston, Va.] : Denver, CO : The Survey ; For sale by USGS Information Services (Open-File Report Sales), 2001

Precambrian basement map of the northern midcontinent, U.S.A a digital representation of the 1990 P.K. Sims map /

[Reston, Va.] : The Survey, 2001

Geologic map of Precambrian rocks of the Hartville uplift, southeastern Wyoming

by Sims, P. K. (Paul Kibler), 1918-
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 1999
Version 1.0.

Preliminary Precambrian basement structure map of the continental United States--an interpretation of geologic and aeromagnetic data

by Sims, P. K. (Paul Kibler), 1918-
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2005

Precambrian time, the story of the early earth

by Lindsey, David A.
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2007
[Version 1.0].

Changes in the nomenclature and stratigraphy of proterozoic metamorphic rocks, Tusas Mountains, North-Central New Mexico

by Wobus, Reinhard A.
Washington : Alexandria, VA : U.S. Dept. of Interior, U.S. Geological Survey ; For sale by Distribution Branch, U.S. Geological Survey, 1985

Las Animas Formation (upper Precambrian) in the subsurface of southeastern Colorado

by Tweto, Ogden, 1912-1983
[Washington, D.C.] : U.S. Dept. of the Interior, U.S. Geological Survey, 1983

Precambrian crystalline basement map of Idaho, an interpretation of aeromagnetic anomalies

by Sims, P. K. (Paul Kibler), 1918-
[Reston, Va.] : Denver, CO : U.S. Dept. of the Interior, U.S. Geological Survey ; Information Services [distributor], 2005
Version 1.0.