On the constitution of the Bradford oil sand
By: by Chas. A. Ashburner ...
Contributors: YA Pamphlet Collection (Library of Congress)
Publisher: s.n.
Published: 1880
Place of publication: [Philadelphia, Pa.?
Language: eng
Subjects: Oil sands -- Pennsylvania.
Notes: Caption title.
"Read before the American Philosophical Society, March 5, 1880."