Published in Nautilus, in 1988, in volume 102, pages 36-39

Published in Nautilus, in 1988, in volume 102, pages 54-55

Published in Nautilus, in 1988, in volume 102, pages 89-91

Published in Nautilus, in 1988, in volume 102, pages 99-101

Published in Nautilus, in 1988, in volume 102, pages 102-105

Published in Nautilus, in 1988, in volume 102, pages 106-109

Published in Nautilus, in 1988, in volume 102, pages 130

Published in Nautilus, in 1988, in volume 102, pages 131-133

Published in Nautilus, in 1988, in volume 102, pages 149-153

Published in Nautilus, in 1988, in volume 102, pages 154-158

Published in Nautilus, in 1988, in volume 102, issue 2, pages 78-81

Published in Nautilus, in 1988, in volume 102, issue 2, pages 82-87