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$55Scientific American Oct 1, 1962
$55Scientific American Nov 1, 1962
$55Scientific American Dec 1, 1962
$105Popular Science Aug 1, 1945
$55Scientific American Feb 1, 1963
$55Scientific American Sep 1, 1963
$55Scientific American Dec 1, 1963
$55Scientific American Jan 1, 1964
$55Scientific American Feb 1, 1964
$55Scientific American Apr 1, 1964
$55Scientific American May 1, 1964
$55Scientific American Jun 1, 1964
$55Scientific American Jul 1, 1964
$55Scientific American Aug 1, 1964
$55Scientific American Sep 1, 1964
$55Scientific American Oct 1, 1964
$55Scientific American Nov 1, 1964
$55Scientific American Dec 1, 1964
$55Scientific American Jan 1, 1965
$55Scientific American Feb 1, 1965
$55Scientific American Mar 1, 1965
$55Scientific American Apr 1, 1965
$55Scientific American May 1, 1965
$55Scientific American Jun 1, 1965
$55Scientific American Jul 1, 1965
$55Scientific American Aug 1, 1965
$55Scientific American Sep 1, 1965
$55Scientific American Oct 1, 1965
$55Scientific American Nov 1, 1965
$55Scientific American Dec 1, 1965
$55Scientific American Jan 1, 1966
$55Scientific American Feb 1, 1966
$55Scientific American Mar 1, 1966
$55Scientific American Apr 1, 1966
$55Scientific American May 1, 1966
$55Scientific American Jun 1, 1966
$55Scientific American Jul 1, 1966
$55Scientific American Aug 1, 1966
$55Scientific American Oct 1, 1966
$55Scientific American Nov 1, 1966
$55Scientific American Dec 1, 1966
$55Scientific American Jan 1, 1967
$55Scientific American Feb 1, 1967
$55Scientific American Mar 1, 1967
$55Scientific American Apr 1, 1967
$55Scientific American May 1, 1967
$55Scientific American Jun 1, 1967
$55Scientific American Jul 1, 1967
$55Scientific American Aug 1, 1967
$55Scientific American Sep 1, 1967
$55Scientific American Oct 1, 1967
$55Scientific American Nov 1, 1967
$55Scientific American Dec 1, 1967
$55Scientific American Feb 1, 1968
$55Scientific American Mar 1, 1968
$55Scientific American Apr 1, 1968
$55Scientific American May 1, 1968
$55Scientific American Jun 1, 1968
$55Scientific American Jul 1, 1968
$55Scientific American Aug 1, 1968