TY - BOOK AU - Pratt,Joseph Hyde TI - Zircon, monazite and other minerals used in the production of chemical compounds employed in the manufacture of lighting apparatus, T2 - North Carolina. Geological and economic survey. Bulletin AV - TN490.A2 P7 PY - 1916/// CY - Raleigh, N.C. PB - Edwards & Broughton printing co. KW - Rare earths KW - Lighting ER -