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FERTILIZER DEMAND FUNCTIONS FOR SPECIFIC NUTRIENTS APPLIED TO THREE MAJOR U.S. CROPS
Roberts, Roland K., (1982)
An econometric simulation model to estimate input socks and expenses, supply response, and resource demand for several U.S. agricultural commodities
Schatzer, Raymond Joe, (1981)
The effects of trade promotion on Canadian agricultural exports
Gunjal, Kisan R., (1985)