TY  - GEN
AU  - CREW,F A E
TI  - Biological factors affecting family size
SN  - 0366-0842
PY  - 2007///1227
KW  - Biological Factors
KW  - Family Characteristics
KW  - Humans
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1136/jech.3.1.1
ER  -