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- An apparatus for determining the helium content of gas mixtures
- Method of analysis of impurities in helium in the parts-per-billion range
- Isotopic abundance of neon, argon, and nitrogen in natural gases :relationship to helium genesis
- An improved method and apparatus for analysis of impurities in helium
- Mass spectrometer method for determining parts per billion helium-3 in helium
- Gravimetric preparation of primary standard gas mixtures in the parts per trillion range
- An improved method for preparing gravimetric standard gas mixtures of helium-4 in nitrogen
- Method and apparatus for direct determination of helium-3 in natural gas and helium