000 00338cam a22001217a 4500
008 180718b1977 xxu||||| |||| 00| 0 eng d
082 _aB0651 Q25/5
100 _aGlenn, Norval D.
245 _aCohort analysis
_cby Norval D. Glenn
260 _aBeverly Hills
_bSage
_c1977
300 _a72p.
650 _aSocial sciences - mathmatical modles
999 _c345524
_d345524