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