Regulation of human fertility : proceedings of a Symposium on Advances in Fertility Regulation / organized by the World Health Organization in collaboration with the Ministry of Health of the USSR, held at the WHO Collaborating Centre for Research and Training in Human Reproduction at the All-Union Scientific Research Institute of Obstetrics and Gynaecology, Moscow on 16-19 November 1976 ; editor, E. Diczfalusy, editorial assistant, A. Diczfalusy.