TY - BOOK ID - 140978326 TI - 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 PY - 1817 PB - Philadelphia A. Small DB - UniCat KW - Geology KW - United States UR - https://www.unicat.be/uniCat?func=search&query=sysid:140978326 AB - ER -