000 00307cam a2200121 4500
001 1857755944
008 060404t2003 xxu||||| |||| 00| 0 eng d
020 _a1857755944
100 _aSpencer, N
245 0 _aWeighing the evidence: how is birthweight determined?
260 _bRadcliffe
_c2003
942 _cBKSTD
999 _c6643
_d6643