Classification
TNA - Nuclear engineering - general
EPK - Nuclear energy
7
TNB - Nuclear power plants
4
PKH - Neutron physics
2
PKP - Radioactivity, electromagnetic transitions
2
PKR - Nuclear reactions, nuclear scattering
2
PKRR - Fission reactions
2
ETF - Fuel cells - general
1
PKB - Elementary particles, nuclei - comprehensive works
1
PKFD - Radiation detectors
1
PKN - Nuclear structure
1
TKH - Air flight, space flight
1
TND - Gas cooled reactor types
1