1. Proc 1983 Space Helium Dewar Conference;Petrac,1983
2. He II phase separaton with slits and porous plugs for space cryogenics
3. Pressmetall Krebsöge, Postfach 1445, 5608 Radevormwald, FRG
4. Sener, S.A. Sor Angela dela Cruz 6, E-28020 Madrid, Spain