Fossil mollusks from the John Day Basin in Oregon, contained in the Condon Museum of the University of Oregon
By: by G. Dallas Hanna. 
Series: University of Oregon Publication -- vol. I, August, 1920, no. 6 
Publisher: University of Oregon
Published: 1920
Place of publication: [Eugene, Or
Language: eng
Subjects: Mollusks, Fossil.; Paleontology -- Oregon.