Published in Contributions in Science, in 1971, in volume 206, pages 1-14

Published in Contributions in Science, in 1971, in volume 207, pages 1-15

Published in Contributions in Science, in 1971, in volume 208, pages 1-15

Published in Contr Sci, in 1971, in volume 209, pages 1-19

Published in Contributions in Science, in 1971, in volume 210, pages 1-10

Published in Contributions in Science, in 1971, in volume 211, pages 1-70

Published in Contributions in Science, in 1971, in volume 212, pages 1-8

Published in Contributions in Science, in 1971, in volume 213, pages 1-37

Published in Contributions in Science, in 1971, in volume 214, pages 1-16

Published in Contributions in Science, in 1971, in volume 215, pages 1-8

Published in Contributions in Science, in 1971, in volume 216, pages 1-40

Published in Contributions in Science, in 1971, in volume 217, pages 1-17

Published in Contributions in Science, in 1971, in volume 218, pages 1-47