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Ineffectiveness of Internal Medication of Poultry for the Control of External Parasites
Parman, D.C., (1928)
FARMER BANKRUPTCIES AND FARM EXITS IN THE UNITED STATES, 1899-2002
Stam, Jerome M., (2004)
How Will Measures to Control Medicare Spending Affect Rural Communities?
Frenzen, Paul D., (1997)