Published in Nautilus, in 1986, in volume 100, pages 23-27

Published in Nautilus, in 1986, in volume 100, pages 39-46

Published in Nautilus, in 1986, in volume 100, pages 46-49

Published in Nautilus, in 1986, in volume 100, pages 78-84

Published in Nautilus, in 1986, in volume 100, pages 96-98

Published in Nautilus, in 1986, in volume 100, pages 98-101

Published in Nautilus, in 1986, in volume 100, pages 101-104

Published in Nautilus, in 1986, in volume 100, pages 112

Published in Nautilus, in 1986, in volume 100, pages 120-121

Published in Nautilus, in 1986, in volume 100, issue 1, pages 38

Published in Nautilus, in 1986, in volume 100, issue 2, pages 71-77