References
- Léridon , H. 1976 . Facts and Artifacts in the Study of Intra-Uterine Mortality: A Reconsideration from Pregnancy Histories . Population Studies , 30 : 319 – 319 .
- James , W. H. 1974 . Spontaneous abortion and birth order . Journal of Biosocial Science , 6 : 23 – 23 .
- Reed , T. E. and Kelly , E. L. 1958 . The completed reproductive performances of 161 couples selected before marriage and classified by ABO blood groups . Annals of Human Genetics , 22 : 165 – 165 .