TY  - BOOK
AU  - Bretsky,Peter William
TI  - Upper Ordivician ecology of the Central Appalachians / 
U1  - 565.393 BRE 
PY  - 1970///
CY  - New Haven : 
PB  - Peabody Museum of Natural History, Yale University, 
KW  - Paleoecology
KW  - Ordovician
KW  - Paleontology
KW  - Appalachian Mountains
N1  -  Includes bibliographyical references (p. 142-150)
ER  -