Roesler, T. W., Lamphear, F. C., & Beveridge, M. D. (1968). The economic impact of irrigated agriculture on the economy of Nebraska. Bureau of Business Research, University of Nebraska.
Dyfyniad Arddull ChicagoRoesler, Theodore W., F. Charles Lamphear, and M. David Beveridge. The Economic Impact of Irrigated Agriculture on the Economy of Nebraska. Lincoln: Bureau of Business Research, University of Nebraska, 1968.
Dyfyniad MLARoesler, Theodore W., et al. The Economic Impact of Irrigated Agriculture on the Economy of Nebraska. Bureau of Business Research, University of Nebraska, 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.