H.G. · Helen Greenberg · Helen Groombridge
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Aos Pais de Adolescentes - Viver sem Drogas | 978-85-01-05449-4 (85-01-05449-6) | 1988 | Eduardo Kalina |
| Mameloshn: Memória em Carne Viva | 978-85-01-06884-2 (85-01-06884-5) | 2004 | |