English and original version by Particle Data Group at Lawrence
Berkeley National Laboratory.
http://pdg.lbl.gov (Contact: pdg@lbl.gov)
Versión en español por el Departamento de Física de la Facultad de Ingeniería (U.N. Mar del Plata - Argentina). http://www.fi.mdp.edu.ar/deptos/fisica/fisica.htm (Contacto: Hilda Larrondo)
Version française par le Groupe Communication du Laboratoire de l'Accélérateur Linéaire d'Orsay (IN2P3-CNRS). http://www.lal.in2p3.fr (Contact: Corinne Augier)
The Quark Adventure and Particle Adventure were made possible through funding from the U.S. Department of Energy (http://home.doe.gov) and the National Science Foundation (http://www.nsf.gov).