340 ISOTOPIC TRACERS AND NUCLEAR RADIATIONS [Chap. 10 



29. Haines, C. L.: Rev. Set. Instruments, 7, 411 (1936). 



30. Simpson, J. A.: Atomic Energy Commission Report MDDC 



31. Ruark, A. E., and H. C. Urey: "Atoms, Molecules, and Quanta," McGraw-Hill 

 Book Company, Inc., New York, 1930. 



32. Fitch, V. L., and E. W. Tttterton: Rev. Sci. Instruments, 18, 821 (1947). 



33. Kohman, T. P.: Atomic Energy Commission Report MDDC 429, 1945. 



34. Hull, D. E.: Rev. Sci. Instruments, 11, 404 (1940). 



35. Ruark, A. E., and F. E. Brammer: Phys. Rev., 52, 322 (1937). 



36. Present, R. D.: Phys. Rev., 72, 243 (1947). 



See also the following references on counting statistics: 



37. Bateman, R.-.Phil. Mag., 20, 704 (1910). 



38. Keston, A. S.: Rev. Sci. Instruments, 14, 293 (1943). 



39. Schtff, L. I.: Phys. Rev., 50, 88 (1936). 



40. Gnedenko, B. V.: 7. Exptl. Theoret. Phys. (U.S.S.R.), 11, 101 (1941). 



41. Volz, H.: Z. Phys., 93, 539 (1935). 



