Não informado. (1888). Bulletin of the Massachusetts Agricultural Experiment Station. Massachusetts Agricultural College.
Chicago-referens (17:e uppl.)Não informado. Bulletin of the Massachusetts Agricultural Experiment Station. Amherst, Mass: Massachusetts Agricultural College, 1888.
MLA-referens (8:e uppl.)Não informado. Bulletin of the Massachusetts Agricultural Experiment Station. Massachusetts Agricultural College, 1888.
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