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$46Scientific American Aug 1, 1974
$46Scientific American Nov 1, 1974
$46Scientific American Sep 1, 1974
$46Scientific American Dec 1, 1974
$46Scientific American Jan 1, 1975
$46Scientific American Feb 1, 1975
$46Scientific American Mar 1, 1975
$46Scientific American May 1, 1975
$46Scientific American Jun 1, 1975
$46Scientific American Jul 1, 1975
$46Scientific American Sep 1, 1975
$46Scientific American Nov 1, 1975
$46Scientific American Dec 1, 1975
$46Scientific American Jan 1, 1976
$46Scientific American Feb 1, 1976
$46Scientific American Mar 1, 1976
$46Scientific American Apr 1, 1976
$46Scientific American May 1, 1976
$46Scientific American Jun 1, 1976
$46Scientific American Jul 1, 1976
$46Scientific American Aug 1, 1976
$46Scientific American Sep 1, 1976
$46Scientific American Oct 1, 1976
$46Scientific American Nov 1, 1976
$46Scientific American Dec 1, 1976
$46Scientific American Jan 1, 1977
$46Scientific American Feb 1, 1977
$46Scientific American Mar 1, 1977
$46Scientific American Apr 1, 1977
$46Scientific American May 1, 1977
$46Scientific American Jun 1, 1977
$46Scientific American Jul 1, 1977
$46Scientific American Aug 1, 1977
$46Scientific American Sep 1, 1977
$46Scientific American Oct 1, 1977
$46Scientific American Nov 1, 1977
$46Scientific American Dec 1, 1977
$46Scientific American Jan 1, 1978
$46Scientific American Feb 1, 1978
$46Scientific American Mar 1, 1978
$46Scientific American May 1, 1978
$46Scientific American Jun 1, 1978
$46Scientific American Jul 1, 1978
$40Scientific American Feb 1, 1980
$46Scientific American Aug 1, 1978
$46Scientific American Sep 1, 1978
$46Scientific American Oct 1, 1978
$117Ladies' Home Journal Jun 1, 1963
$46Scientific American Nov 1, 1978
$46Scientific American Dec 1, 1978
$46Scientific American Jan 1, 1979
$46Scientific American Feb 1, 1979
$46Scientific American Mar 1, 1979
$46Scientific American Apr 1, 1979
$46Scientific American May 1, 1979
$46Scientific American Jun 1, 1979
$46Scientific American Jul 1, 1979
$46Scientific American Aug 1, 1979
$46Scientific American Sep 1, 1979
$46Scientific American Oct 1, 1979