Showing 1 - 20 results of 180 Refine Results
  1. 1
    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 1978 Oct 01. 75(10), 4633-4637.

  2. 2
    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 1979 Dec 01. 76(12), 6030-6034.

  3. 3
    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 1977 Feb 01. 74(2), 430-433.

  4. 4
    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 1984 Feb . 81(4), 1280-1283.

  5. 5
    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 1981 Jan 01. 78(1), 36-40.

  6. 6
    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 1981 May 01. 78(5), 2659-2663.

  7. 7
    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 1981 Jun 01. 78(6), 3287-3291.

  8. 8
    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 1981 Dec 01. 78(12), 7839-7843.

  9. 9
    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 1982 May . 79(10), 3380-3383.

  10. 10
  11. 11
  12. 12
    Academic Journal
  13. 13
    Academic Journal

    Source: The Annals of Mathematical Statistics, 1947 Mar 01. 18(1), 18-36.

  14. 14
    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 1971 Dec 01. 68(12), 3111-3115.

  15. 15
    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 1972 Sep 01. 69(9), 2532-2536.

  16. 16
    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 1972 Oct 01. 69(10), 3019-3023.

  17. 17
  18. 18
  19. 19
    Academic Journal

    Source: Journal of Applied Physics; Feb1952, Vol. 23 Issue 2, p184-194, 11p

  20. 20
    Academic Journal