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Productivity trends in a sectoral macroeconomic model : a study of American agriculture and supporting industries 1919 - 1964
Gossling, W. F., (1972)
Statistical vs. judgement and audience considerations in the formulation and use of econometric models
Crowder, Richard T., (1972)
TECHSIM: a regional field crop and national livestock econometric simulation model
Collins, Glenn S., (1983)
Agricultural policy under economic development
Heady, Earl O., (1962)
The agriculture of the U. S.
Heady, Earl O., (1976)
Heady, Earl O., (1977)