Particle
http://www-pdg.lbl.gov/ (Rank: 366086)
http://www-spires.slac.stanford.edu/spires/ (Rank: 464546)
http://durpdg.dur.ac.uk/HEPDATA/ (Rank: 488976)
http://www.cap.bnl.gov/mumu/ (Rank: 1109436)
http://www-spires.dur.ac.uk/HEPDATA/PART/ (Rank: 1777188)
http://www.fnal.gov/projects/muon_collider/ (Rank: 1835495)
http://www.aps.org/units/dpf/ (Rank: 1935615)
http://www.slac.stanford.edu/library/pdg/hepinfo.html (Rank: 2106862)
http://blueflag.phys.yorku.ca/yhep/ppp.html (Rank: 2196596)
http://csr.phys.ualberta.ca/nalta (Rank: 2208939)
http://www.sc.doe.gov/production/henp/np/ (Rank: 2252555)
http://www.cern.ch/RD11/rkb/titleD.html (Rank: 2281282)
http://frontierscience.lnf.infn.it/ (Rank: 2334310)
http://www.bnl.gov/edm/ (Rank: 2412337)
http://www.fnal.gov/pub/ferminews/ahep.html (Rank: 2430827)
http://www.jupiterscientific.org/sciinfo/fundmass.html (Rank: 2652373)
http://home.cern.ch/~rkb/titleA.html (Rank: 2778317)