Actions
Incoming Resources
- Geology and mineral resource assessment of the Venezuelan Guayana Shield at 1:500,000 scale, a digital representation of maps published by the U.S. Geological Survey, by Paul G. Schruben ... [and others]
- Geology of the conterminous United States at 1:2,500,000 scale, a digital representation of the 1974 P.B. King and H.M. Beikman map, U.S. Department of the Interior, U.S. Geological Survey ; by Paul G. Schruben, Raymond E. Arndt, and Walter J. Bawiec ; display software by Russell A. Ambroziak
- Geology and resource assessment of the Venezuelan Guayana Shield at 1:500,000 scale, a digital representation of maps published by the U.S. Geological Survey, by Paul G. Schruben ... [and others]
- Geology and resource assessment of Costa Rica at 1:500,000 scale, a digital representation of maps of the U.S. Geological Survey's 1987 folio I-1865, U.S. Department of the Interior, U.S. Geological Survey ; by Paul G. Schruben ; display software by Russell A. Ambroziak