Ammonites from the Buchia zones in northwestern California and southwestern Oregon, / by Ralph W. Imlay and David L. Jones
Series Titles:
Jurassic (Tithonian) and Cretaceous Buchia zones in northwestern California and southwestern Oregon Geological Survey professional paper ; 647-B Geological Survey professional paper ; 647-B. Jurassic (Tithonian) and Cretaceous Buchia zones in northwestern California and southwestern Oregon.