1. Albrecht VS, Connolly KD. Wise replacement for NWP26? Nat Wetlands Newsl 1998;20(5):7, 9–10.
2. Applying an index of biotic integrity based on stream-fish communities: considerations in sampling and interpretation;Angermeier;NAJMDP,1986
3. Comparison between restored and reference sedge meadow wetlands in south-central Wisconsin;Ashworth;Wetlands,1997
4. Boylan KD, Maclean DR. Linking species loss with wetland loss. Nat Wetlands Newsl 1997;19(6):1, 13–17.
5. Brinson MM. A Hydrogeomorphic classification for wetlands. Technical Report WRP-DE-4. US Army Corps of Engineers Waterways Experiment Station, Vicksburg, 1993:77.