WO9425395-A1  '13th Symposium of Fusion Technology' September 1984 , VARESE, ITALY see page 421 - page 426;  "13th Symposium of Fusion Technology" September 1984, VARESE, ITALY page 421 - page 426;  JOURNAL OF THE LESS COMMON METALS 1991 , NETHERLANDS pages 1157 - 1167 H. ALBRECHT ET AL. 'Application of SAES and HWT gas purifiers for the removal of impurities from helium-hydrogen gas mixtures';  JOURNAL OF THE LESS COMMON METALS 1991, NETHERLANDS pages 1157 - 1167 H. ALBRECHT ET AL. "Application of SAES and HWT gas purifiers for the removal of impurities from helium-hydrogen gas mixtures"US5492682-A  Albrecht et al "Application of SAES & AWT Gas Purifiers. . ." J. Less Common Metals 172-174 (1991) 1157-1167;  Heimbach et al "Removal of Nitrogen and Methane from Hydrogen by Metal Getters", Fusion Technology, vol. 1, pp. 421-426 (no date available)EP696257-B1  '13th Symposium of Fusion Technology' September 1984 , VARESE, ITALY see page 421 - page 426;  JOURNAL OF THE LESS COMMON METALS 1991 , NETHERLANDS pages 1157 - 1167 H. ALBRECHT ET AL. 'Application of SAES and HWT gas purifiers for the removal of impurities from helium-hydrogen gas mixtures'US6436352-B1  Albrecht et al Application of SAES and HWT gas purifiers for the removal of impurities from helium-hydrogen gas mixtures, "Journal of the Less-Common Metals"; 172-174, 1991; pp. 1157-1167. (no month).;  Albrecht et al, "Application of SAES and HWT gas purifiers for the removal of impurities from helium-hydrogen gas mixtures", Journal of the Less-Common Metals, 172-174 (1991) 1157-1167.*;  Albrecht, et al., "Application of SAES and HWT gas purifiers for the removal of impurities from helium-hydrogen gas mixtures," 1991, Journal of the Less-Common Metals, pgs. 1157-1167.;  George et al., Removal of simple hydrocarbons from a rare gas by a 70% Zr-25% V-5% Fe getter, Gas Separation & Purification, vol. 3, Jun. 1989; pp. 50-55.;  Heimbach et al., "Removal of Nitrogen and Methane from Hydrogen by Metal Getters"; Sep. 1984; Euratom pp. 421-426.;  Heimbach et al., "Removal of Nitrogen and Methane from Hydrogen by Metal Getters," 1984, Fusion Technology, vol. 1, pp. 421-426.