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Stocks of grains, oilseeds, and hay : final estimates by States, 1969-75
(1978)
Grovfoderproduktion og grovfoderkonservering : rapport fra en studierejse i USA 1951
Bagge, Hans, (1953)
Silage costs on Northeastern dairy farms
Wysong, John W., (1963)
Silage, silage crops and silos
Henning, P. D., (1962)