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NASS North American Sundial Society for sundials, gnomonics, history of sundials, theory of sundials, making sundials, using sundials, sundial education, teaching sundials, sundial curriculum, sundial construction, sundial design, sun and shadows, solar a
NASS, sundials, gnomonics, cadrans, cadrans solaires, sol cadrans, orologi solari e meridiane, sonnenuhr, sonnenuhren, slunecni hodiny, horizontal dial, vertical dial, equatorial dial, polar dial, ring dial, armillary, analemma, equinox, solstice, analemm
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