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A User's guide to DER permits.

APA Citation

Pennsylvania. Dept. of Environmental Resources. (1988). A User's guide to DER permits. [Rev. 7/88]. [Harrisburg, PA]: Commonwealth of Pennsylvania, Dept. of Environmental Resources.

MLA Citation

Pennsylvania. Dept. of Environmental Resources. A User's Guide to DER Permits. [Rev. 7/88]. [Harrisburg, PA]: Commonwealth of Pennsylvania, Dept. of Environmental Resources, 1988.

Warning: These citations may not always be complete (especially for serials).