1. Factors that control the stable carbon isotopic composition of methane produced in an anoxic marine sediment;Alperin;Global Biogeochem. Cycles,1992
2. Geologic framework of the ground-water system in Jurassic and cretaceous rocks in the northern great plains, in parts of Montana, North Dakota, South Dakota, and Wyoming;Anna,1986
3. Estimating 14C groundwater ages in a methanogenic aquifer;Aravena;Water Resour. Res.,1995
4. Water quality and environmental isotopic analyses of ground-water samples collected from the Wasatch and Fort union formations in areas of coalbed methane development—implications to recharge and ground-water flow, Eastern Powder River Basin, Wyoming;Bartos,2002