00317nam a2200109 a 450000500170000008200150001710000060003211000360003824500620007426000490013630000220018520251203091148.0  a500,PROb_  d_  aIndian National Science Academy  aProceedings of the Indian National Science Academy;vol.46  aDelhibIndian National Science Academyc1980  axxiii,607p.c22cm