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Prisregulering indenfor konsummælk handelen
Thomassen, G., (1948)
American agriculture : the changing structure
Owen, Wyn F., (1969)
Family farm organization and commercialization of agriculture
Chipeta, Chinyamata, (1976)
Variability of yields and income from major Illinois crops 1927-1953
Swanson, Earl R., (1957)
Research in the economics of the agricultural firm
Swanson, Earl R., (1959)
Note sulla produttività dell'agricoltura degli Stati Uniti : relazione, Urbino, 1975
Swanson, Earl R., (1976)