TY  - BOOK
AU  - Richter,Judith
TI  - Vaccination: against pregnancy 
PY  - 1996///
CY  - [España]
PB  - The ecologist
KW  - Embarazo
KW  - Antoconceptivos
UR  - https://cieg-b.bibliotecas.unam.mx:81/opac-tmpl/bootstrap/images/documentos/pdf_pug01/000004581.pdf
ER  -