Experiment Station work, XXXIV : compiled from the publications of the Agricultural Experiment Stations : U.S. Department of agriculture : Farmers' bulletin No. 251 / prepared in the office of Experiment Stations, A.C. True, director .— : Government printing office, 1906 .— 32 с. — Lang: eng .— URL: https://rucont.ru/efd/120157 (дата обращения: 15.11.2025)