Published in Nautilus, in 1971, in volume 84, pages 82-83

Created: 2016-08-10, modified: 2016-08-10

Published in Nautilus, in 1971, in volume 84, pages 84-86

Created: 2016-08-10, modified: 2016-08-10

Published in Nautilus, in 1971, in volume 84, pages 93-96

Created: 2016-08-10, modified: 2016-08-10

Published in Nautilus, in 1971, in volume 84, pages 101-117

Created: 2016-08-10, modified: 2017-10-19

Published in Nautilus Philad, in 1971, in volume 84, pages 107-109

Created: 2016-08-10, modified: 2016-08-10

Published in Nautilus, in 1971, in volume 84, pages 120-127

Created: 2016-08-10, modified: 2016-08-10

Published in Nautilus, in 1971, in volume 85, pages 12-17

Created: 2016-08-10, modified: 2016-08-10

Published in Nautilus Philad, in 1971, in volume 85, pages 20-26

Created: 2016-08-10, modified: 2016-08-10

Published in The Nautilus, in 1971, in volume 85, issue 2, pages 49-51

Created: 2011-03-04, modified: 2011-10-03