Regional changes in grain production: an application of spatial linear programmi
Egbert, Alvin C.
Regional changes in grain production: an application of spatial linear programmi - Ames 1964 - 981-1016 p. - No. 521; Iowa Agricultural and .
Regional changes in grain production: an application of spatial linear programmi - Ames 1964 - 981-1016 p. - No. 521; Iowa Agricultural and .