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$44LIFE Dec 9, 1957
$44LIFE Mar 18, 1957
$44LIFE Feb 25, 1957
$61The Economist Sep 25, 1993
$61The Economist May 6, 1995
$61The Economist May 25, 1996
$61The Economist Jul 6, 1996
$61The Economist Aug 24, 1996
$61The Economist Nov 2, 1996
$61The Economist Aug 2, 1997
$61The Economist Jan 24, 1998
$61The Economist Mar 28, 1998
$61The Economist Jun 27, 1998
$61The Economist Jul 11, 1998
$61The Economist Aug 1, 1998
$61The Economist Apr 17, 1999
$61The Economist Oct 2, 1999
$61The Economist Jan 29, 2000
$61The Economist Feb 12, 2000
$61The Economist Jul 29, 2000
$61The Economist Jun 2, 2001
$61The Economist Sep 15, 2001
$61The Economist Jan 12, 2002
$61The Economist Sep 17, 2002
$61The Economist Oct 19, 2002
$61The Economist Jun 21, 2003
$61The Economist Aug 23, 2003
$61The Economist Sep 13, 2003
$61The Economist Nov 1, 2003
$61The Economist Nov 15, 2003
$61The Economist Feb 7, 2004
$61The Economist May 22, 2004
$61The Economist Jun 12, 2004
$61The Economist Aug 21, 2004
$61The Economist Sep 11, 2004
$61The Economist Nov 20, 2004
$61The Economist Jan 29, 2005
$61The Economist Feb 12, 2005
$61The Economist Feb 19, 2005
$61The Economist Mar 5, 2005
$61The Economist Aug 13, 2005
$61The Economist Dec 24, 2005
$61The Economist Aug 20, 2005
$61The Economist Jan 28, 2006
$61The Economist Feb 11, 2006
$61The Economist Mar 11, 2006
$61The Economist Jun 24, 2006
$61The Economist Jul 15, 2006
$61The Economist Aug 12, 2006
$61The Economist Sep 2, 2006
$61The Economist Sep 16, 2006
$61The Economist Nov 11, 2006
$65Scientific American Feb 1, 1955
$65Scientific American Mar 1, 1955
$65Scientific American Apr 1, 1955
$65Scientific American Aug 1, 1955
$65Scientific American Jul 1, 1958
$65Scientific American Aug 1, 1958
$65Scientific American Jan 1, 1959
$65Scientific American Feb 1, 1959