Jenkins, Herb2019-08-202019-08-201955RPB-102-07-007http://hdl.handle.net/20.500.11867/17658Single sheet 10 x 8 inch. Attached caption on the back. Date est.Photograph of a spike driver on the Milwaukee Spur with caption attached to the back. See also RPB-102-06-001 through 006 and RPB-102-07-001 through 006.Photograph