Assabet River Rail Trail - Non-profit organization to create, promote, and help maintain a multi-purpose recreational trail through the communities of Marlborough, Hudson, Stow, Maynard, and Acton.
Amateur Telescope Makers of Boston (ATMoB) - Club supporting observation, star parties, telescope design/building/improvement and astro-photography.
NE Soil - Featuring soil information by county, ground penetrating radar, GIS, and soil profile photos.
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