APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Bibawy, Nabil A., and David E. Emerson. An Improved Method for Preparing Gravimetric Standard Gas Mixtures of Helium-4 in Nitrogen. United States Dept. of the Interior, Bureau of Mines, 1990.