| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Guia de investigacion para ninos interesados en problemas urbanos y en otras cuestiones/ Investigation Guide for Children Interested in Urban Problems and in Other Matters | 978-97O-7O1-483-1 (97O-7O1-483-O) | 2004 |
g G · G. Ruiz · G S · Gerardo Ruiz · Gerardo Sanchez · S R