APA (7th ed.) Citation

Kuhn, E. A., & Colorado Geological Survey. (1990). Directory and statistics of Colorado coal mines with distribution and electric generation map, 1989. Colorado Geological Survey, Dept. of Natural Resources.

Chicago Style (17th ed.) Citation

Kuhn, Edwin A., and Colorado Geological Survey. Directory and Statistics of Colorado Coal Mines With Distribution and Electric Generation Map, 1989. Denver, Colo.: Colorado Geological Survey, Dept. of Natural Resources, 1990.

MLA (8th ed.) Citation

Kuhn, Edwin A., and Colorado Geological Survey. Directory and Statistics of Colorado Coal Mines With Distribution and Electric Generation Map, 1989. Colorado Geological Survey, Dept. of Natural Resources, 1990.