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  1. 1
    Helium in ground water and soil gas in the vicinity of Bush Dome Reservoir, Cliffside Field, Potter County, Tex. /
    by Holland, Philip W.
    Published 1979
    Government Document Book
  2. 2
    A method for determining helium in water /
    by Holland, Philip W.
    Published 1981
    Government Document Book
  3. 3
    An analyzer for determining helium-4 in the parts-per-billion range /
    by Holland, Philip W.
    Published 1984
    Government Document Book
  4. 4
    An improved analyzer for determining helium-4 in parts-per-billion range /
    by Seitz, Charles A.
    Published 1986
    Government Document Book
  5. 5
    A mass spectrometer method for determining helium in the parts-per-million to 10-percent range /
    by Holland, Philip W.
    Published 1991
    Government Document Book
  6. 6
    A mass spectrometer method for determining percent-range helium in gaseous mixtures.
    by Holland, Philip W.
    Published 1996
    Government Document Book
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