This book was written to honour the two most important directors of the Zoo in Buenos Aires Eduardo Holmberg and Clemente Onelli.
| Language | Spanish |
| Pages | 16 |
| Size | 11 × 10 cm |
| Cover | Paperback, full color |
| Interior | Colour |
| Editorial | Le Comte Editores |
| ISBN | 9789872269265 |
