00314nam a2200109 a 450000500170000008200150001710000060003211000360003824500620007426000490013630000190018520251203091148.0  a500,PROb_  d_  aIndian National Science Academy  aProceedings of the Indian National Science Academy;vol.47  aDelhibIndian National Science Academyc1981  axl,736p.c22cm