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$171Popular Science Nov 1, 1935
$196Popular Science Jan 1, 1936
$196Popular Science Mar 1, 1936
$171Popular Science May 1, 1936
$196Popular Science Nov 1, 1936
$196Popular Science Dec 1, 1936
$160Popular Science Jan 1, 1937
$171Popular Science Mar 1, 1937
$171Popular Science Apr 1, 1937
$196Popular Science May 1, 1937
$171Popular Science Jun 1, 1937
$171Popular Science Sep 1, 1937
$171Popular Science Oct 1, 1937
$171Popular Science Feb 1, 1938
$171Popular Science May 1, 1938
$160Popular Science Jun 1, 1938
$171Popular Science Nov 1, 1938
$171Popular Science Jan 1, 1939
$160Popular Science May 1, 1939
$160Popular Science Jun 1, 1939
$171Popular Science Oct 1, 1939
$171Popular Science Nov 1, 1939
$171Popular Science Dec 1, 1939
$148Popular Science Jan 1, 1940
$148Popular Science Feb 1, 1941
$148Popular Science Jan 1, 1942
$148Popular Science Mar 1, 1942
$148Popular Science Apr 1, 1942
$148Popular Science May 1, 1942
$148Popular Science Jul 1, 1942
$148Popular Science Nov 1, 1942
$148Popular Science Dec 1, 1942
$134Popular Science Feb 1, 1943
$148Popular Science Sep 1, 1943
$148Popular Science Nov 1, 1943
$148Popular Science Feb 1, 1944
$110Popular Science Dec 1, 1944
$58Scientific American Apr 1, 1962
$58Scientific American May 1, 1962
$58Scientific American Jun 1, 1962
$58Scientific American Oct 1, 1962
$58Scientific American Nov 1, 1962
$58Scientific American Dec 1, 1962
$110Popular Science Aug 1, 1945
$58Scientific American Feb 1, 1963
$58Scientific American Sep 1, 1963
$58Scientific American Dec 1, 1963
$58Scientific American Jan 1, 1964
$58Scientific American Feb 1, 1964
$58Scientific American Apr 1, 1964
$58Scientific American May 1, 1964
$58Scientific American Jun 1, 1964
$58Scientific American Jul 1, 1964
$58Scientific American Aug 1, 1964
$58Scientific American Sep 1, 1964
$58Scientific American Oct 1, 1964
$58Scientific American Nov 1, 1964
$58Scientific American Dec 1, 1964
$58Scientific American Jan 1, 1965
$58Scientific American Feb 1, 1965