Barnstable Land Trust
- Organization details, special events, reports and newsletters, and contact details.
- http://www.blt.org/

Northeast Coastal Areas Study Significant Coastal Habitats: Hyannis Coastal Ponds Complex
- Project map, general habitat description, signifiance and uniqueness of area, environmental threats and conservation considerations, from the EPA's National Estuary Program.
- http://training.fws.gov/library/pubs5/necas/web_link/37_hyannis%20ponds.htm

Three Bays Preservation
- Information on group, includes newsletters, progress reports, and links to local and environmental resources.
- http://www.3bays.org/