The efficiency of natural fertility control: new perspectives
- de Irala, J.
- Gómez Gracia, E.
- Fernández-Crehuet, J.
Journal:
Atencion primaria / Sociedad Española de Medicina de Familia y Comunitaria
ISSN: 0212-6567
Year of publication: 1991
Volume: 8
Issue: 8
Type: Review