Washington (State). Division of Mines and Mining, Washington (State). Division of Mines and Geology, & Washington (State). Division of Geology and Earth Resources. Directory of Washington mining operations. Department of Conservation and Development, Division of Mines and Geology.
Cita Chicago Style (17a ed.)Washington (State). Division of Mines and Mining, Washington (State). Division of Mines and Geology, y Washington (State). Division of Geology and Earth Resources. Directory of Washington Mining Operations. Olympia, Wash.: Department of Conservation and Development, Division of Mines and Geology.
Cita MLA (8a ed.)Washington (State). Division of Mines and Mining, et al. Directory of Washington Mining Operations. Department of Conservation and Development, Division of Mines and Geology.