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1Published 1976“...U.S. Dept. of Agriculture, Economic Research Service,...”
Government Document Conference Proceeding Book -
2Published 1987“...U.S. Dept. of Agriculture, Economic Research Service,...”
Government Document Conference Proceeding Book -
3Published 1987“...U.S. Dept. of Agriculture, Economic Research Service,...”
Government Document Conference Proceeding Book -
4Published 1991“...U.S. Dept. of Agriculture, Economic Research Service ;...”
Government Document Conference Proceeding Microform Book -
5Published 1997“...U.S. Dept. of Agriculture, Economic Research Service ;...”
Government Document Conference Proceeding Microform Book -
6Published 1986“...U.S. Dept. of Agriculture, Economic Research Service,...”
Government Document Conference Proceeding Book