Bibawy, Nabil A.
An improved method for preparing gravimetric standard gas mixtures of helium-4 in nitrogen / by Nabil A. Bibawy and David E. Emerson. - Washington, DC : United States Dept. of the Interior, Bureau of Mines, 1990. - 7 p. : ill. - Report of investigations ; 9312 . - Report of investigations (United States. Bureau of Mines); 9312. .
91045114
Gases.
Mixing.
Helium.
Nitrogen.
An improved method for preparing gravimetric standard gas mixtures of helium-4 in nitrogen / by Nabil A. Bibawy and David E. Emerson. - Washington, DC : United States Dept. of the Interior, Bureau of Mines, 1990. - 7 p. : ill. - Report of investigations ; 9312 . - Report of investigations (United States. Bureau of Mines); 9312. .
91045114
Gases.
Mixing.
Helium.
Nitrogen.