Published in Nautilus, in 1982, in volume 96, pages 3-6

Published in Nautilus, in 1982, in volume 96, pages 40-42

Published in Nautilus, in 1982, in volume 96, pages 42-45

Published in Nautilus, in 1982, in volume 96, pages 45-48

Published in Nautilus, in 1982, in volume 96, pages 61-66

Published in Nautilus, in 1982, in volume 96, pages 99-104

Published in Nautilus, in 1982, in volume 96, pages 115-116

Published in Nautilus, in 1982, in volume 96, pages 116-120