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2. Properties of Getters in Electron Tubes;Wagener,1959
3. An Updated Review of Getters and Gettering;Giorgi;J. Vac. Sci. Technol.,1985
4. The Adsorption and Absorption of Hydrogen by Evaporated Tantalum Films;Hayward,1969
5. A Tantalum Evaporation Pump;Okano,1977