APA Citation

Gemmell, A. (1949). The charcoal iron industry in the Perkiomen Valley microform. Allentown, Pa.: [s.n.].

Chicago Style Citation

Gemmell, Alfred. The Charcoal Iron Industry in the Perkiomen Valley Microform. Allentown, Pa.: [s.n.], 1949.

MLA Citation

Gemmell, Alfred. The Charcoal Iron Industry in the Perkiomen Valley Microform. Allentown, Pa.: [s.n.], 1949.

Warning: These citations may not always be 100% accurate.