1. Carbon-brush contact films;Savage;Gen. Elec. Rev.,1945
2. High altitude brush problem;Ramadanoff;Elec. Eng.,1944
3. Introduction to Crystal Analysis;Bragg,1928
4. UHV-controlled atmosphere test chamber using mercury vapor pump sets;Bryant,1961
5. UHV-controlled atmosphere test chamber using mercury vapor pump sets;Bryant,1962