70305968
9781018857220
Pennsylvania State Geologist (1836-1 is the author of '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 Great Britain; Volume 1', published 2022 under ISBN 9781018857220 and ISBN 1018857222.
[read more]