APA (7th ed.) Citation

Helfinstine, R. D. (1958). An economic comparison of dry-land farming and potential irrigation farming in central South Dakota. [publisher not identified].

Chicago Style (17th ed.) Citation

Helfinstine, Rex David. An Economic Comparison of Dry-land Farming and Potential Irrigation Farming in Central South Dakota. [Berkeley?]: [publisher not identified], 1958.

MLA (9th ed.) Citation

Helfinstine, Rex David. An Economic Comparison of Dry-land Farming and Potential Irrigation Farming in Central South Dakota. [publisher not identified], 1958.