00365nam a2200109 a 450000500170000008200210001710000230003824500870006126000700014830000230021870000140024120251203091945.0  a954.004,bD, Ray  aRay, Priyadaranjan  aCultural Heritage of India, Vol.VI: Science and Technology, Priyadaranjan Ray, eng  aCalcutta, The Ramakrishna Mission, Institute of Culture, Inc1991  axix, 550p.c26 cm.  aSen, S.N.