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21
Witt, Peter A., 335.5-W827j-P
| School of natural resources the Ohio state university |
1992
335.5-W827j-P,
22
Witt, Peter A., 335.5-W827j-P
| School of natural resources the Ohio state university |
1992
335.5-W827j-P,
23
Angeline, Peter J., 004.73-A582a-P
| MIT Press |
1996
004.73-A582a-P,
24
Witt, Peter A, 690-N277l-P
| National Recreation and Park Association |
1979
690-N277l-P,