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$50Scientific American Dec 1, 1973
$180Popular Science Jan 1, 1933
$50Scientific American Jan 1, 1974
$50Scientific American Mar 1, 1974
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$50Scientific American Jun 1, 1974
$50Scientific American Jul 1, 1974
$50Scientific American Aug 1, 1974
$50Scientific American Nov 1, 1974
$50Scientific American Sep 1, 1974
$50Scientific American Dec 1, 1974
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$50Scientific American Jun 1, 1975
$50Scientific American Jul 1, 1975
$50Scientific American Sep 1, 1975
$50Scientific American Nov 1, 1975
$50Scientific American Dec 1, 1975
$50Scientific American Jan 1, 1976
$50Scientific American Feb 1, 1976
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$50Scientific American Apr 1, 1976
$50Scientific American May 1, 1976
$50Scientific American Jun 1, 1976
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$50Scientific American Dec 1, 1976
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$50Scientific American Jul 1, 1978
$44Scientific American Feb 1, 1980
$50Scientific American Aug 1, 1978
$50Scientific American Sep 1, 1978
$50Scientific American Oct 1, 1978
$129Ladies' Home Journal Jun 1, 1963
$50Scientific American Nov 1, 1978
$50Scientific American Dec 1, 1978
$50Scientific American Jan 1, 1979
$50Scientific American Feb 1, 1979