00514nam a2200169 a 450000500170000008200150001710000060003211000360003824500870007426000490016130000100021069000120022096400230023299700120025599900170026795200600028420251203091148.0  a500,PROb_  d_  aIndian National Science Academy  aProceedings of the Indian National Science Academy;vol.53.Part.A:Physical sciences  aDelhibIndian National Science Academyc1987  a700p.  aScience  bENGLISHcdefg_  a31408 W  c32203d32203  02104070aPUbPUd1999-03-25l0o500,PRO _p31408yBK