Não informado. (1888). Bulletin of the Massachusetts Agricultural Experiment Station. Massachusetts Agricultural College.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Bulletin of the Massachusetts Agricultural Experiment Station. Amherst, Mass: Massachusetts Agricultural College, 1888.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Bulletin of the Massachusetts Agricultural Experiment Station. Massachusetts Agricultural College, 1888.
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