Annual report on mining activities /
Commonwealth of Pennsylvania, Department of Environmental Protection.
APA Citation
Pennsylvania. Dept. of Environmental Protection., Pennsylvania. Bureau of Deep Mine Safety. (19952000). Annual report on mining activities. Harrisburg:: Pennsylvania Dept. of Environmental Protection.
MLA Citation
Pennsylvania. Dept. of Environmental Protection, and Pennsylvania. Bureau of Deep Mine Safety. Annual Report On Mining Activities. Harrisburg:: Pennsylvania Dept. of Environmental Protection, 19952000.
Warning: These citations may not always be complete (especially for serials).