1. Methane Emissions From Coal Mining: Issues and Opportunities for Reduction;Boyer,1990
2. Biogeochemical Aspects of Atmospheric Methane;Cicerone;Global Biogeochemical Cycles,1988
3. Coalbed Methane Resources of the United States,1984
4. An Overview of Methane Liberations From U.S. Coal Mines in The Last 15 Years;Grau,1987
5. Measurement of Gaseous Emission Rates from Land Surfaces Using an Emission Isolation Flux Chamber - User's Guide;Klenbusch,1986