Unknown creator; St. Louis University; Parks College of Saint Louis University. (1943). Students at Parks College provide line service.
Παραπομπή σε μορφή Chicago (17η εκδ.)Unknown creator; St. Louis University; Parks College of Saint Louis University. Students at Parks College Provide Line Service. 1943.
Παραπομπή σε μορφή MLA (8th εκδ.)Unknown creator; St. Louis University; Parks College of Saint Louis University. Students at Parks College Provide Line Service. 1943.
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