Não informado. (1887). Bulletin of the Nebraska Agricultural Experiment Station. University of Nebraska, College of Agriculture.
Chicago-viite (17. p.)Não informado. Bulletin of the Nebraska Agricultural Experiment Station. Lincoln, Neb: University of Nebraska, College of Agriculture, 1887.
MLA-viite (8. p.)Não informado. Bulletin of the Nebraska Agricultural Experiment Station. University of Nebraska, College of Agriculture, 1887.
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