Published in Nautilus, in 1973, in volume 87, pages 13-18

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

Published in Nautilus, in 1973, in volume 87, pages 66-71

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

Published in Nautilus, in 1973, in volume 87, pages 91-92

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

Published in The Nautilus, in 1973, in volume 87, issue 1, pages 29

Created: 2012-07-18, modified: 2023-02-16