Classification
EFK - Petroleum deposits, natural gas deposits
1
EFP - Petroleum production, natural gas production
1
FAAC - Engineering materials - reference books
1
FPTK - Corrosion in specific environments
1
LKH - Biochemistry - methods
1
LKP - Biochemistry of carbohydrates
1
PKLF - Elementary particles - specific reactions, phenomenology
1
UPCE - Water chemistry
1