Search Results

  • Showing 1 - 5 results of 5
Refine Results
  1. 1

    Gravimetric preparation of primary standard gas mixtures in the parts per trillion range by Loya, Ernest W.

    Published 1982
    Book
  2. 2

    Helium resources of the United States, 1989 / by Miller, Richard D.

    Published 1990
    Unknown
  3. 3

    An improved method for preparing gravimetric standard gas mixtures of helium-4 in nitrogen / by Bibawy, Nabil A.

    Published 1990
    Unknown
  4. 4

    Isotopic purification of helium by differential distillation below the lambda-point / by Tully, Philip C.

    Published 1975
    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
    Unknown