1. An assessment of the value of fetal scalp blood sampling;Farr;J. Obstet. Gynaec. Brit. Comm,1970
2. International Conference on Monitoring of the Fetal Heart Newark, N. J. 1971
3. Is fetal monitoring worthwhile?;Brit. Med. J.,1971
4. Northern Obstetrical and Gynaecological Society Meeting Aberdeen, Scotland 1969
5. Sahling First European Perinatal Congress West Berlin, Germany 1968