Hardcover
details (USA).
(see also: Board book)
ISBN: 978-0-7394-7142-5
ISBN-10: 0-7394-7142-2
(978-0-7394) · 1998
| See also: | ||
| 2009 | Tapa blanda | La fortaleza digital (Narrativa) |
| 2006 | Tapa blanda | La fortaleza digital (Narrativa (umbriel)) |
| 2006 | Audio CD | La Fortaleza Digital (Spanish Edition) |