00633cam a22002291 4500 sa 67000856 DLC 20260227112318.0 740123s1966 ii ab b 00000aeng sa 67000856 //r84 PL480:I-E-7376 a-ii--- TN809.I4 A53 622.182 Indian Bureau of Mines. Memoirs on coal exploration, second five year plan, 1963. Nagpur [1966] viii, 582 p. illus., maps (part fold.) 29 cm. Bibliography: p. 581-582. Coal India. Borings India. 72254 72254