| 000 | 00388nam a22000977a 4500 | ||
|---|---|---|---|
| 999 |
_c18989 _d18989 |
||
| 245 |
_aA study of infant mortality from linked records : _bcomparison of neonatal mortality from two cohort studies, United States / _cUS Dept. of Health, Education and Welfare |
||
| 260 |
_aMaryland : _bUS Dept. of Health, Education and Welfare _c1972. |
||
| 300 | _a99 p. | ||
| 650 | _aCohort studies | ||
| 942 | _cRB | ||