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$61Scientific American Oct 1, 1962
$61Scientific American Nov 1, 1962
$61Scientific American Dec 1, 1962
$116Popular Science Aug 1, 1945
$61Scientific American Feb 1, 1963
$61Scientific American Sep 1, 1963
$61Scientific American Dec 1, 1963
$61Scientific American Jan 1, 1964
$61Scientific American Feb 1, 1964
$61Scientific American Apr 1, 1964
$61Scientific American May 1, 1964
$61Scientific American Jun 1, 1964
$61Scientific American Jul 1, 1964
$61Scientific American Aug 1, 1964
$61Scientific American Oct 1, 1964
$61Scientific American Nov 1, 1964
$61Scientific American Dec 1, 1964
$61Scientific American Jan 1, 1965
$61Scientific American Feb 1, 1965
$61Scientific American Mar 1, 1965
$61Scientific American Apr 1, 1965
$61Scientific American May 1, 1965
$61Scientific American Jun 1, 1965
$61Scientific American Jul 1, 1965
$61Scientific American Aug 1, 1965
$61Scientific American Sep 1, 1965
$61Scientific American Oct 1, 1965
$61Scientific American Nov 1, 1965
$61Scientific American Dec 1, 1965
$61Scientific American Jan 1, 1966
$61Scientific American Feb 1, 1966
$61Scientific American Mar 1, 1966
$61Scientific American Apr 1, 1966
$61Scientific American May 1, 1966
$61Scientific American Jun 1, 1966
$61Scientific American Jul 1, 1966
$61Scientific American Aug 1, 1966
$61Scientific American Oct 1, 1966
$61Scientific American Nov 1, 1966
$61Scientific American Dec 1, 1966
$61Scientific American Jan 1, 1967
$61Scientific American Feb 1, 1967
$61Scientific American Mar 1, 1967
$61Scientific American Apr 1, 1967
$61Scientific American May 1, 1967
$61Scientific American Jun 1, 1967
$70In Touch Vol. 1 No. 4 Sep 1, 1974
$61Scientific American Jul 1, 1967
$61Scientific American Aug 1, 1967
$61Scientific American Sep 1, 1967
$61Scientific American Oct 1, 1967
$61Scientific American Nov 1, 1967
$61Scientific American Dec 1, 1967
$61Scientific American Feb 1, 1968
$61Scientific American Mar 1, 1968
$61Scientific American Apr 1, 1968
$61Scientific American May 1, 1968
$61Scientific American Jun 1, 1968
$61Scientific American Jul 1, 1968
$61Scientific American Aug 1, 1968