TY  - BOOK
AU  - Shps,Mindl C.
AU  - Menken,Jane A.
AU  - Radick,Annette P.
TI  - Mathematical models of conception and birth
SN  - 0226752453
U1  - 612.63018 
PY  - 1973///
CY  - Chicago
PB  - The University Press
KW  - Childbirth
KW  - Statistics
KW  - Birth intervals
KW  - Birth control
N1  - Includes index
ER  -