Mètode de grallaFrancesca Roig, Jaume Arnella i París, Francesca Roig Galceran · First published 1992Open the Tome
Complete idiot's guide to understanding cloningJay D. Gralla, Preston Gralla · First published 2004Open the Tome
The Complete Idiot's Guide to Internet Privacy and SecurityPreston Gralla · First published 2002Open the Tome
The complete idiot's guide to volunteering for teensPreston Gralla · First published 2001Open the Tome
The complete idiot's guide to cool ways to communicate onlinePreston Gralla · First published 2000Open the Tome
The complete idiot's guide to protecting yourself onlinePreston Gralla · First published 1999Open the Tome
