 | Duncan M. Porter, Sheila Ann Dean, Paul S. White, Sarah Wilmot - 2001 - 762 페이지
...1863-4. London: Sampson Low, Son, & Marston. Rogers, Henry Darwin. 1858. The geology of Pennsylvania. A government survey with a general view of the geology of the United States, essays on the coal-formation and its fossils, and a description of the coal-ßelds of North America... | |
 | John Hosack - 2000 - 728 페이지
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 | Julius Adams Stratton, Loretta H. Mannix - 2005 - 830 페이지
...Mifflin & Co.; Cambridge, Mass.: Riverside Press, 1896. Rogers, Henry D. Tlie Geology of Pennsylvania: A Government Survey: with a General View of the Geology of the United States, Essays on Coal-Formation and Its Fossils, and a Description of the Coal-Fields of North America and... | |
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The Geology of Pennsylvania. A Government survey, with a general view of the Geology of the United States, Essays on the Coal Formation and its Fossils, and a description of the Coal Fields of North America and Great Britain. 
