Additions to the Flora of the Spotted Ridge Formation in Central Oregon Sergius H. Mamay Published: 1956 Total Pages: 38 Get eBook
Geological Survey Professional Paper Geological Survey (U.S.) Published: 1956 Total Pages: 282 Get eBook
A List of the Publications of the United States Geological Survey, Not Including Topographical Maps Geological Survey (U.S.) Published: 1879 Total Pages: 478 Get eBook
Historical perspective of early twentieth century Carboniferous paleobotany in North America William Culp Darrah Published: 1995 Total Pages: 428 Get eBook
List of U.S. Geological Survey Geologic and Water-supply Reports and Maps for Oregon Geological Survey (U.S.) Published: 1987 Total Pages: 88 Get eBook
