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Gary Christen

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Valliere's Natural Cycles Almanac, 1990
Valliere's Natural Cycles Almanac, 1989
Valliere's Natural Cycles Almanac, 1988
Valliere's Natural Cycles Almanac, 1987
Valliere's Natural Cycles Almanac, 1986
Valliere's Natural Cycles Almanac, 1985
Valliere's Natural Cycles Almanac, 1984