The Mineral industry of Pennsylvania in ...
APA Citation
Pennsylvania. Bureau of Topographic and Geologic Survey. (1955). The Mineral industry of Pennsylvania in ... [Harrisburg, Pa.]: Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey.
MLA Citation
Pennsylvania. Bureau of Topographic and Geologic Survey. The Mineral Industry of Pennsylvania In ... [Harrisburg, Pa.]: Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey, 1955.
Warning: These citations may not always be complete (especially for serials).