Supporting geologic studies of total petroleum systems and assessment units for the Denver Basin Province are in progress. Assessment results from the 1995 National Oil and Gas Assessment project are located at

http://energy.cr.usgs.gov/oilgas/noga/

Klett, T.R., Schmoker, J.W., Charpentier, R.R., Ahlbrandt, T.S., and Ulmishek, G.F., 2000, Glossary, in U.S. Geological Survey World Energy Assessment Team, U.S. Geological Survey World Petroleum Assessment 2000—Description and results: U.S. Geological Survey DDS-60, 4 CD-ROMs. http://greenwood.cr.usgs.gov/energy/WorldEnergy/DDS-60/

Magoon, L.B., and Dow, W.G., 1994, The petroleum system, in L.B. Magoon, and Dow, W.G., eds., The petroleum system—From source to trap: American Association of Petroleum Geologists Memoir 60, p. 3­23.

NRG Associates, Inc., 2000, Signifi cant oil and gas fi elds database: Colorado Springs, Colorado, NRG Associates, Inc. [Database available from NRG Associates, Inc., P.O. Box 1655, Colorado Springs, CO 80901 U.S.A.]

PI/Dwights Well History Control System database, 1999a, [available from IHS Energy, 4100 Dry Creek Road, Littleton, CO 80122].

PI/Dwights petroROM Production Data on CD-ROM, 1999b, [available from IHS Energy, 4100 Dry Creek Road, Littleton, CO 80122].