TY  - BOOK
AU  - Maclure,William
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 ..
AV  - QE77 .M12
PY  - 1817///
CY  - Philadelphia
PB  - Printed for the author by A. Small
KW  - Geology
KW  - United States
N1  - Read as a memoir before the American philosophical society, and inserted in the first volume of their Transactions, new series
ER  -