ISBN 1362623644 books & textbook
The Geology of Pennsylvania; a Government Survey: With a General View of the Geology of the United States, Essays on Coal-formation and Its Fossils, ... North America and Great Britain; Volume 2:1
Pennsylvania State Geologist (1836-1841 Rogers, Henry D (Henry Darwin) 1808-18
Wentworth Press /2016-08-26 Hardcover / 728 Pages
isbn-10: 1362623644 / isbn-13: 9781362623649
