Maryland Vegetable Growers' Association & University of Maryland Cooperative Extension Service. (1936). News letter. Maryland Vegetable Growers Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Maryland Vegetable Growers' Association και University of Maryland Cooperative Extension Service. News Letter. College Park, Md.: Maryland Vegetable Growers Association, 1936.
Παραπομπή σε μορφή MLA (8th εκδ.)Maryland Vegetable Growers' Association και University of Maryland Cooperative Extension Service. News Letter. Maryland Vegetable Growers Association, 1936.
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