TY  - BOOK
AU  - Dahlberg,Gunnar
TI  - Twin births and twins from a hereditary point of view
AV  - GN295.T9D27 
PY  - 1926///
CY  - Stockholm
PB  -  : Tidens Tryckeri, 
KW  - Twins
KW  - Heredity
KW  - Human
ER  -