Northern Prairie Wildlife Research Center
| Sourcea | Stream | Year(s) | Sites | |
| 1 | Bell Museum of Natural History, University of Minnesota | 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28 | 1955-1979 | 292 |
| 2 | Copes, F.A. and R.A. Tubb | 2, 3, 4, 5, 6, 7, 8, 9, 10, 12 | 1964 | 62 |
| 3 | Enblom, J.W. | 27 | 1976 | 14 |
| 4 | Feldman, R.M. | 5 | 1962 | 8 |
| 5 | Hankinson, T.L. | 1, 2, 4, 11 | 1922 | 8 |
| 6 | Hanson, S.R. et al. | 16 | 1980 | 14 |
| 7 | Illinois Natural History Survey | 6 | 1978 | 1 |
| 8 | Kreil, R.L. and L.F. Ryckman | 2 | 1987 | 15 |
| 9 | MN Department of Natural Resources, Ecological Services Sectionb | 1, 2, 3, 4, 5, 6, 7, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 | 1983-1994 | 164 |
| 10 | MN Department of Natural Resources, Section of Fisheries | 16, 21, 22, 24, 25, 27 | 1975-1992 | 53 |
| 11 | Naplin, R.L. et al. | 19 | 1976 | 10 |
| 12 | ND Game and Fish Department | 1, 8, 9, 11, 12, 13 | 1976-1989 | 76 |
| 13 | ND Department of Healthb | 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13 | 1993-1994 | 33 |
| 14 | North Dakota State University, Department of Zoology | 9, 11, 12, 18, 20, 22 | 1993-1994 | 33 |
| 15 | Olson, T.A. | 18, 19, 20, 21, 22, 23 | 1932 | 18 |
| 16 | Peterka, J.J. | 11 | 1977 | 12 |
| 17 | Peterka, J.J. | 2, 3, 4, 5, 6, 7 | 1991 | 48 |
| 18 | Renard, P.A. et al. | 21 | 1976-1977 | 26 |
| 19 | Renard, P.A. et al. | 1 | 1984 | 41 |
| 20 | Russel, G.W. | 11, 12 | 1974 | 38 |
| 21 | Tubb, R.A. et al. | 11 | 1964 | 25 |
| 22 | Wilson, H.W. | 11 | 1950 | 9 |
| 23 | Woolman, A.J. | 1, 2, 3, 4, 5, 6, 7, 10, 11, 14, 16, 18, 21 | 1892 | 18 |
| 24 | University of Michigan, Museum of Zoologyc | 6, 10, 11, 16, 21 | 1892-1951 | 9 |
aSee References
bSeveral sites were sampled during a cooperative effort by the
Minnesota Department of Natural Resources, Minnesota Pollution Control Agency,
North Dakota Department of Health, U.S. Environmental Protection Agency, and
U.S. Geological Survey.