New Scientist Apr 13, 1972
New Scientist May 11, 1972
New Scientist Jun 1, 1972
New Scientist Jun 15, 1972
New Scientist Jul 20, 1972
New Scientist Jul 27, 1972
New Scientist Aug 17, 1972
New Scientist Oct 5, 1972
New Scientist Dec 7, 1972
New Scientist Dec 14, 1972
New Scientist Dec 21, 1972
New Scientist Dec 28, 1972
