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by Jeffery, G. H.; Vogel, Arthur Israel.;
Year: 1989., Callno: 546 VOG
Book
by Ecological Society of Australia.; Nix, H. A.;
Callno: 05:577.4(94)
Journal
by American Agricultural Economics Association.; Martin, Lee R.; Judge, George C.; American Agricultural Economics Association.;
Year: 1977., Callno: 63:338 SUR
Book