000 00262 a2200121 4500
020 _a817824182X
082 _a954.08881
100 _aKosambi, M
245 _aCrossing thresholds
260 _aNew Delhi :
_bPermanent black,
_c2007
300 _a397p.
942 _cBK
999 _c9884
_d9884