Key points are not available for this paper at this time.
A. M. Lilienfeld, E. Parkhurst, R. Patton, E. R. Schlesinger, Accuracy of Supplemental Medical Information on Birth Certificates, Public Health Reports (1896-1970), Vol. 66, No. 7 (Feb. 16, 1951), pp. 191-198
Lilienfeld et al. (Mon,) studied this question.