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. Graphical Method for the Analysis of Bridge Trusses: Extended to Continuous ... - Seite 31 von Charles Ezra Greene - 1875 - 79 Seiten Vollansicht -
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