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Models of population and income : economic planning in rural areas
Willis, K. G., (1971)
Farm resources needed for specified income levels
Brewster, John M., (1957)
The northern farmer and his markets during the late colonial period
Schumacher, Max George, (1975)
Criteria and problems in the use of quantitative analytical procedures for public development investments
Cotner, Melvin L., (1962)
Optimum timing of long-term resource improvements
Cotner, Melvin L., (1963)
A policy for public investments in natural resources
Cotner, Melvin L., (1969)