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Mid-America Paleontology Society (MAPS)
Michigan Mineralogical Society (MMS)
Memphis Archaeological and Geological Society (MAGS)
McPherson Gem and Mineral Club
Maryland Geological Society
Maplewood Rock & Gem Club
Lubbock Gem and Mineral Society
Lowcountry Gem and Mineral Society (LGMS)
Lawrence County Rock Club, Inc.
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