https://nonprofitlocator.org/organizations/me/cliff-island/010351986-cliff-island-coporation-for-athletics-and-conservation-education https://nonprofitlocator.org/organizations/me/cliff-island/010393670-cliff-island-community-memorial-fund https://nonprofitlocator.org/organizations/me/cliff-island/203511930-cliff-island-historical-society https://nonprofitlocator.org/organizations/me/cliff-island/311569617-cliff-island-library-club