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

APA Citation

Bibawy, N. A., Emerson, D. E. (1990). An improved method for preparing gravimetric standard gas mixtures of helium-4 in nitrogen. [Washington, D.C.]: United States Dept. of the Interior, Bureau of Mines.

MLA Citation

Bibawy, Nabil A, and David E Emerson. An Improved Method for Preparing Gravimetric Standard Gas Mixtures of Helium-4 In Nitrogen. [Washington, D.C.]: United States Dept. of the Interior, Bureau of Mines, 1990.

Warning: These citations may not always be complete (especially for serials).