1. High-purity tungsten by fluoride reduction;Nieberlein;U.S. Bur. Mines Rept. Invest. 5539,1959
2. Vapor deposition of tungsten on MERM rocket nozzles;Hoertel;U.S. Bur. Mines Rept. Invest. 6464,1964
3. Chemical vapor deposition, a rediscovered tool for molecular engineering;Blocher;Battelle Tech. Rev.,1963
4. Vapor-plating of tungsten for rocket applications;Nieberlein;Phys. Sci. Lab., Directorate of Res. and Develop., U.S. Army Missile Command, Rept. R. R-Tr-64-6,1964