A Grotto is an internal organization of the National Speleological Society (NSS). They generally function as the local NSS chapter/club. Many Grottos however, operate in areas outside their local area, with many operating in several states.[1] Most Grottos also participate in Regions which are loose associations of Grottos.[1] Regions are also an internal organization of the National Speleological Society.[1]
- ^ a b c Weberg, Meredith Hall. NSS News Members Manual. National Speleological Society. p. 2, 53–65.
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