Published in Contributions in Science, in 1961, in volume 40, pages 1-12

Published in Contributions in Science Los Angeles, in 1961, in volume 41, pages 1-27

Published in Contributions in Science, in 1961, in volume 42, pages 1-34

Published in Contributions in Science, in 1961, in volume 43, pages 1-11

Published in Contributions in Science, in 1961, in volume 44, pages 1-28

Published in Contributions in Science, in 1961, in volume 45, pages 1-75

Published in Contributions in Science, in 1961, in volume 46, pages 1-4

Published in Contributions in Science, in 1961, in volume 48, pages 1-12