000 00375cam a22001217a 4500
008 180718b1993 xxu||||| |||| 00| 0 eng d
100 _aVittas, Dimitri
245 _aThe simple(r) algebra of pension plans
_cby Dimitri Vittas
260 _aWashington, D.C.
_bWorld Bank
_c1993
300 _a35p.
440 _aWorking Papers, WPS 1145
650 _aPensions --Mathematical models
999 _c231066
_d231066