TY  - BOOK
AU  - Stevenson,John J.
ED  - American Philosophical Society
TI  - Interrelations of the fossil fuels,
AV  - TN800 .S6
PY  - 1916///-1921
CY  - Lancaster, Pa.
PB  - New era printing company
KW  - Coal
KW  - Geology, Stratigraphic
KW  - Carboniferous
N1  - "Reprinted from Proceedings of the American philosophical society, v. 55, 1916; v. 56, 1917; v. 57, 1918; v. 59, 1921."
ER  -