Stratigraphic Studies of the Silurian Rocks of Pennsylvania

Harrisburg, Pa.: Commonwealth of Pennsylvania Dept. of Internal Affairs, 1965. Brown Folio w/ black binding; 8 p., 9 fold. maps. 46 cm Very Fine ;ex library w/accession stamp. Cardboard Covers.

Pennsylvania. Bureau of Topographic and Geologic Survey Special bulletin 11; Geology, Stratigraphic -- Silurian.  Geology -- Pennsylvania.  Geology -- New York (State)