Pennsylvania. Bureau of Topographic and Geologic Survey & Blust, Sandra. (1986). Annotated bibliography of Pennsylvania geology: Supplement to 1979. The Survey.
Chicago Style (17th ed.) CitationPennsylvania. Bureau of Topographic and Geologic Survey and Sandra Blust. Annotated Bibliography of Pennsylvania Geology: Supplement to 1979. Harrisburg: The Survey, 1986.
MLA (9th ed.) CitationPennsylvania. Bureau of Topographic and Geologic Survey and Sandra Blust. Annotated Bibliography of Pennsylvania Geology: Supplement to 1979. The Survey, 1986.
Warning: These citations may not always be 100% accurate.