共 81 条
- [2] MATERNAL AGE AT 1ST CHILDBIRTH AND RISK OF LOW-BIRTH-WEIGHT AND PRETERM DELIVERY IN WASHINGTON-STATE [J]. JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION, 1993, 270 (21): : 2574 - 2577
- [4] Alonso-Colmenares Maria Dolores, 1999, ENCUESTA PRESUPUESTO
- [6] [Anonymous], AM J MED GENET, V26, P605
- [7] [Anonymous], SCAND J ECON, V120, P296
- [8] [Anonymous], EC J APPL EC, V8, P193