Use of contraceptive methods in Spain: Results of a national survey

1. Lete, I.
2. Bermejo, R.
3. Coll, C.
4. Dueñas, J.L.
5. Doval, J.L.
6. Martínez-Salmeán, J.
7. Masset, J.
8. Parrilla, J.J.
9. Serrano, I.