Economic effects of western Federal land use restrictions on U.S. coal marketsWilliam Downing Watson · First published 1991Open the Tome
Enforcement economics in air pollution controlPaul B. Downing, William D. Watson, United States. Environmental Protection Agency. Office of Research and Development · First published 1973Open the Tome
Costs of air pollution control in the coalfield electric power industryWilliam Downing Watson · First published 1970Open the Tome
