Spring Drill Formation
MLA
E.C. Kropp Co., Milwaukee. "Spring Drill Formation." Hall County Library System (Ga.). 1906/1950, https://dlg.usg.edu/record/hall_rlpc_20241017-0108#item.
APA
E.C. Kropp Co., Milwaukee (1906/1950). Spring Drill Formation. Retrieved from https://dlg.usg.edu/record/hall_rlpc_20241017-0108#item
Chicago
E.C. Kropp Co., Milwaukee. "Spring Drill Formation." 1906/1950. January 4, 2026. https://dlg.usg.edu/record/hall_rlpc_20241017-0108#item.
