Technical report /
Cooperative National Park Resources Studies Unit, University of California, Western Region, National Park Service, Department of the Interior.

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Item Link Original Source
Limited (search only)   1,3,6,9 (1981-82) University of Minnesota
Limited (search only)   11-12 (1983) University of Minnesota
Limited (search only)   14,16-17 (1983-84) University of Minnesota
Limited (search only)   19-21 (1985) University of Minnesota
Limited (search only)   22-26 (1986-88) University of Minnesota
Limited (search only)   28-32 (1988) University of Minnesota
Limited (search only)   33-36 (1988-89) University of Minnesota
Limited (search only)   37-42 (1990) University of Minnesota
Limited (search only)   43-46 (1991-92) University of Minnesota
Limited (search only)   47-50 (1992) University of Minnesota
Limited (search only)   51-55 (1993) University of Minnesota