Não informado. (1955). Texas agricultural progress. Texas Agricultural Experiment Station.
Chicago-referens (17:e uppl.)Não informado. Texas Agricultural Progress. College Station, Tex: Texas Agricultural Experiment Station, 1955.
MLA-referens (8:e uppl.)Não informado. Texas Agricultural Progress. Texas Agricultural Experiment Station, 1955.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.