Sinha R K Treatise on industrial minerals of India - Bombay Allied Publidhers Private India 1967 - xviP529. P.6-7,10,13,36,41,49,70,79,80,83,120,176,178,180,195,229,265,268,314,318,441,447,453,480. cm. Bibliography:Chapter wise; Index:P497-29 Source: General Book Subjects--Topical Terms: Geography Dewey Class. No.: U672.2.N6, K7-K7-;1