(Q45046750)
Statements
1 reference
Is the natural twinning rate still declining? (English)
1 reference
1 reference
Jørn Olsen
1 reference
Axel Skytthe
1 reference
Anne Maria Herskind
1 reference
Olga Basso
1 reference
1 July 2005
1 reference
1 reference
16
1 reference
4
1 reference
591-592
1 reference
Identifiers
1 reference
1 reference