Observations on the Geology of the United States of America: With Some Remarks on the Effect Produced on the Nature and Fertility of Soils, by the Decomposition of the Different Classes of Rocks; and an Application to the Fertility of Every State in the Union, in Reference to the Accompanying Geological Map ...Stechert-Hafner, 1962 - 127 páginas |
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Observations on the Geology of the United States of America William Maclure Vista de fragmentos - 1962 |