Published in Nautilus, in 1978, in volume 92, pages 12-14
Published in Nautilus, in 1978, in volume 92, pages 19-20
Published in Nautilus, in 1978, in volume 92, pages 41-54
Published in Nautilus, in 1978, in volume 92, pages 61-67
Published in Nautilus, in 1978, in volume 92, pages 85-88
Published in Nautilus, in 1978, in volume 92, pages 88-91
Published in Nautilus, in 1978, in volume 92, pages 117-123
Published in Nautilus, in 1978, in volume 92, pages 123-125
Published in Nautilus, in 1978, in volume 92, pages 160-167