Published in Nautilus, in 1984, in volume 98, pages 28-30

Published in Nautilus, in 1984, in volume 98, pages 31-36

Published in Nautilus, in 1984, in volume 98, pages 85-97

Published in Nautilus, in 1984, in volume 98, pages 99-101

Published in Nautilus, in 1984, in volume 98, pages 121-123

Published in Nautilus, in 1984, in volume 98, pages 126-128

Published in Nautilus, in 1984, in volume 98, pages 145-147