Não informado. Science serves your farm and home. West Virginia Agricultural Experiment Station.
Lua i Stíl Chicago (17ú heag.)Não informado. Science Serves Your Farm and Home. Morgantown, Wa. Va: West Virginia Agricultural Experiment Station.
Lua MLA (8ú heag.)Não informado. Science Serves Your Farm and Home. West Virginia Agricultural Experiment Station.
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