Study, by the crop survey method, of factors influencing the yield of potatoes
Hardenburg, Earle V.
Study, by the crop survey method, of factors influencing the yield of potatoes - Ithaca 1922 - 1139-1279 p. - Cornell Agricultural Experime .
Study, by the crop survey method, of factors influencing the yield of potatoes - Ithaca 1922 - 1139-1279 p. - Cornell Agricultural Experime .