Cite

Power Shovels, Midland Coal Co., Mecca Mine (abandoned). Toluca, Illinois (681-248)

MLA

Plowden, David (1932). Power Shovels, Midland Coal Co., Mecca Mine (abandoned). Toluca, Illinois (681-248). Box 9. 1981 June. https://collections.library.yale.edu/catalog/2036772.

APA, 6th edition

Plowden, David (1932). (["Box 9"])(1981 June)[Power Shovels, Midland Coal Co., Mecca Mine (abandoned). Toluca, Illinois (681-248)]. https://collections.library.yale.edu/catalog/2036772.