Classification
EFA - Petroleum, natural gas
21
EAA - Energy - reference books
3
CTA - Chemical analysis - comprehensive works
1
CXA - Coal and fossil fuel - chemistry and technology
1
CXR - Natural gas and petroleum - chemistry and technology
1
CXRS - Petroleum
1
EEA - Coal - general
1
FNL - Polymers, plastics - specific materials
1