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Pennsylvania's agricultural economy : trends, issues, and prospects : proceedings of a conference held at University Park, PA, March 20-21, 1990
- "Conference papers and proceedings"@en
- "Pennsylvania's agricultural economy : trends, issues, and prospects : proceedings of a conference held at University Park, PA, March 20-21, 1990"@en
- "Pennsylvania's agricultural economy trends, issues, and prospects : proceedings of a conference held at University Park, PA, March 20-21, 1990"@en