Federal

• Environmental Protection Agency (EPA)
  • EPA Office of Water - Wetlands Division
• US Fish and Wildlife Service (FWS)
  • FWS Endangered Species Program
• National Oceanic & Atmospheric Administration (NOAA)
• US Geological Survey (USGS)
• Natural Resources Conservation Service (NRCS)
• The Wetland Plants and Communities of Minnesota and Wisconsin Book; Eggers, Steve D. and Donald M. Reed; 1997; USACE; 263 pages. Online Version or Order Form

State

• Michigan Department of Natural Resources and Environment (MDNRE)
  • Coastal & Inland Waters Permit Information System (CIWPIS)
• Indiana Department of Natural Resources (IDNR)
• Indiana Department of Environmental Management (IDEM) Section 401 Water Quality Certification
  

Other Organizations

• Society of Wetland Scientists
• Association of State Wetland Managers
• Great Lakes Information Network (GLIN)
• Michigan Sea Grant
• Michigan State University Extension