00337nam a2200109 a 450000500170000008200150001710000060003211000360003824500870007426000490016130000170021020251203091148.0  a500,PROb_  d_  aIndian National Science Academy  aProceedings of the Indian National Science Academy;vol.51.Part.A:Physical sciences  aDelhibIndian National Science Academyc1985  a1053p.c22cm