Published in Nautilus, in 1987, in volume 101, pages 3-8

Created: 2012-03-12, modified: 2012-03-12

Published in Nautilus, in 1987, in volume 101, pages 59-68

Created: 2012-03-12, modified: 2012-03-12

Published in Nautilus, in 1987, in volume 101, pages 111-116

Created: 2012-03-12, modified: 2012-03-12

Published in Nautilus, in 1987, in volume 101, pages 133-139

Created: 2012-03-12, modified: 2012-03-12

Published in Nautilus, in 1987, in volume 101, pages 154

Created: 2012-03-12, modified: 2012-03-12

Published in Nautilus, in 1987, in volume 101, pages 155-161

Created: 2012-03-12, modified: 2012-03-12

Published in Nautilus, in 1987, in volume 101, pages 162-165

Created: 2012-03-12, modified: 2012-03-12

Published in Nautilus, in 1987, in volume 101, pages 166-181

Created: 2012-03-12, modified: 2012-03-12

Published in Nautilus, in 1987, in volume 101, pages 200-206

Created: 2012-03-12, modified: 2012-03-12