Published in Nautilus, in 1975, in volume 89, pages 1-4

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

Published in Nautilus, in 1975, in volume 89, pages 47-48

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

Published in Nautilus, in 1975, in volume 89, pages 50

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

Published in The Nautilus, in 1975, in volume 89, issue 3, pages 80-86

Created: 2016-11-05, modified: 2016-11-05