Cita APA (7th ed.)

(1949). Investigation of the Benjamin Franklin graphite mine (government owned) and the Just graphite mine, Chester County, Pa. / by Robert S. Sanford and Frank D. Lamb.

Cita Chicago (17th ed.)

Investigation of the Benjamin Franklin Graphite Mine (government Owned) and the Just Graphite Mine, Chester County, Pa. / by Robert S. Sanford and Frank D. Lamb. 1949.

Cita MLA (9th ed.)

Investigation of the Benjamin Franklin Graphite Mine (government Owned) and the Just Graphite Mine, Chester County, Pa. / by Robert S. Sanford and Frank D. Lamb. 1949.