Holland, Philip W.
A mass spectrometer method for determining helium in the parts-per-million to 10-percent range / by Philip W. Holland. - Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, [1991] - 8 p. : ill. ; 28 cm. - Report of investigations ; 9359 . - Report of investigations (United States. Bureau of Mines ; 9359. .
Includes bibliographical references (p. 8).
90027339
Mine gases--Analysis.
Helium--Measurement.
Mass spectrometry.
TN23 TN305 / .U43 no. 9359
622/.82
A mass spectrometer method for determining helium in the parts-per-million to 10-percent range / by Philip W. Holland. - Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, [1991] - 8 p. : ill. ; 28 cm. - Report of investigations ; 9359 . - Report of investigations (United States. Bureau of Mines ; 9359. .
Includes bibliographical references (p. 8).
90027339
Mine gases--Analysis.
Helium--Measurement.
Mass spectrometry.
TN23 TN305 / .U43 no. 9359
622/.82