TY  - BOOK
AU  - Niswander,Kenneth R.
AU  - Gordon,Myron
ED  - National Institute of Neurological Diseases and Stroke
ED  - United States.
TI  - The women and their pregnancies: the Collaborative Perinatal Study of the National Institute of Neurological Diseases and Stroke 
U1  - 614.4273021 
PY  - 1972///
CY  - Washington, D. C.
PB  - The Departement
KW  - Collaborative Perinatal Project (U.S.)
KW  - Pregnancy
KW  - United States
KW  - Statistics
KW  - Complications
KW  - Childbirth
KW  - Statistics, Medical
N1  - "Characteristics and conditions of pregnancy, by institution": (microfiche. 2 sheets 11 x 15 cm.) in pocket; In
ER  -