Published in Nautilus, in 1985, in volume 99, pages 9-13

Published in Nautilus, in 1985, in volume 99, pages 28-33

Published in Nautilus, in 1985, in volume 99, pages 35-44

Published in Nautilus, in 1985, in volume 99, pages 45-47

Published in Nautilus, in 1985, in volume 99, pages 58-61

Published in Nautilus, in 1985, in volume 99, pages 81-84

Published in Nautilus, in 1985, in volume 99, pages 87-89

Published in Nautilus, in 1985, in volume 99, pages 91-94

Published in Nautilus, in 1985, in volume 99, pages 97-100

Published in Nautilus, in 1985, in volume 99, pages 102-107

Published in Nautilus, in 1985, in volume 99, issue 4, pages 139-141