Published in Nautilus, in 1963, in volume 76, pages 95-99

Published in Nautilus, in 1963, in volume 76, pages 135-138

Published in Nautilus, in 1963, in volume 76, pages 138-140

Published in Nautilus, in 1963, in volume 76, pages 140-143

Published in Nautilus, in 1963, in volume 76, pages 145-148

Published in Nautilus, in 1963, in volume 77, pages 62-63