TY - BOOK AU - Johnstone,Sydney J. ED - Barid Baran Collection (National Library, India) TI - The rare earth industry: including the manufacture of incandescent mantles, pyrophoric alloys and electrical glow lamps U1 - 546.6 PY - 1918/// CY - London PB - C. Lockwood KW - Rare earths KW - Radioactivity N1 - Includes index ER -