000 00303nam a2200109Ia 4500
008 151011s9999 xx 000 0 und d
041 _aENG
245 _aProceedings of the national academy sciences
260 _c1961
_aAllahabad
_bNational Academy of Sciences
300 _a31v. 449p.
942 _cBK
_2udc
999 _c21322
_d21322