1. Generation, accumulation, and resource potential of biogenic gas;Rice;AAPG Bull,1981
2. Relation of natural gas composition to thermal maturity and source rock type in San Juan Basin, northwestern New Mexico and southwestern Colorado;Rice;AAPG Bull,1983
3. History of gas produced from coal seams in the San Juan Basin;Dugan,1988
4. Composition and origins of coalbed gas;Rice,1993