White, I. C. (1878). Report of progress in the Beaver River District of the bituminous coal-fields of Western Pennsylvania: Illustrated with three geological maps of parts of Beaver, Butler and Allegheny counties, and 21 plates of vertical sections. Board of Commissioners for the Second Geological Survey of Pennsylvania.
Chicago-Zitierstil (17. Ausg.)White, Israel C. Report of Progress in the Beaver River District of the Bituminous Coal-fields of Western Pennsylvania: Illustrated with Three Geological Maps of Parts of Beaver, Butler and Allegheny Counties, and 21 Plates of Vertical Sections. Harrisburg: Board of Commissioners for the Second Geological Survey of Pennsylvania, 1878.
MLA-Zitierstil (9. Ausg.)White, Israel C. Report of Progress in the Beaver River District of the Bituminous Coal-fields of Western Pennsylvania: Illustrated with Three Geological Maps of Parts of Beaver, Butler and Allegheny Counties, and 21 Plates of Vertical Sections. Board of Commissioners for the Second Geological Survey of Pennsylvania, 1878.