TY  - BOOK
AU  - Rantakallio Paula
TI  - Effect of a northern climate on seasonality of births and the outcome of pregnancies
U1  - 312.1 
PY  - 1971///
CY  - Oulu
PB  - Univ. of Oulu
KW  - Births
KW  - Population
KW  - Pregnancies
ER  -