Classification
PKL - Elementary particles - interactions, reactions, resonances
PKA - Elementary particles, nuclei - general
2
PKF - Elementary particles, nuclei - measuring methods and instruments
2
AFG - Large scale research institutions (Helmholtz Centres)
1
PKB - Elementary particles, nuclei - comprehensive works
1
PKGC - Particle accelerators (reports)
1
PKGF - Cyclic accelerators, storage facilities
1
PKLF - Elementary particles - specific reactions, phenomenology
1
PLA - Astrosciences - general
1