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Displaying 1-2 of 2 results for author "Piotrowski, Robert G."
Greater Pittsburgh region, thickness of rocks over the Upper Freeport coal / by J.L. Craft, L. Heyman, and R.G. Piotrowski ; prepared by the Pennsylvania Bureau of Topographic and Geologic Survey in cooperation with the United States Department of the Interior, Geologic Survey ; Lajos J. Balogh, cartographic draftsman.
- Cartographic
- [Harrisburg] : The Bureau, 1976.
- 1976
- 1 Item
Item details Format Call Number Item Location Cartographic Map Div. 07-4487 Schwarzman Building - Map Division Room 117 Available - Can be used on site. Please visit New York Public Library - Schwarzman Building to submit a request in person.
Greater Pittsburgh region, thickness of rocks over the Upper Freeport coal / by J.L. Craft, L. Heyman, and R.G. Piotrowski ; prepared by the Pennsylvania Bureau of Topographic and Geologic Survey in cooperation with the United States Department of the Interior, Geologic Survey ; Lajos J. Balogh, cartographic draftsman.
- Cartographic
- [Harrisburg, Pa.] : Pennsylvania. Bureau of Topographic and Geologic Survey, 1976.
- 1976
- 1 Item
Item details Format Call Number Item Location Cartographic Map Off-site
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