Classification
YFF - Industrial safety regulations
6
THA - Mechanical engineering - general
4
CAU - Laboratory and safety engineering in chemistry
3
HCN - Nuclear medicine
3
HYG - Occupational medicine, sports medicine
3
TIG - Reliability, safety, quality control
3
UAU - Fire, fire protection, safety at the workplace, prevention of accidents
3
UXL - Radiation protection - general aspects
3
CUW - Mass spectroscopy
2
LTE - Biotechnology - general aspects
2
UXH - Nuclear radiation measurement
2
AHF - Research and science
1
CAE - Chemistry - general
1
CLE - Combustion, flames, explosions
1
CTS - Gas chromatography
1
CTYH - Sampling and sample preparation in chemical analysis
1
CTYM - Trace analysis
1
HBA - Medical physics
1
HCG - Radiology
1
HPA - Drug lists, pharmacopoeias, pharmacologic glossaries
1
HRD - Dosimetry, radiation protection - medical aspects
1
HYE - Environmental health
1
LTU - Genetic engineering
1
MFAA - Combinations, graphs, tournaments
1
TAT - Engineering Standards
1
TEA - Electrical engineering - general
1
TEDD - Electric power transmission
1
THP - Pressure vessels, boilers, pipes
1
TKA - Civil engineering - general
1
UAX - Environment - information systems, literature guides
1
UCA - Environmental problems, man and environment - general aspects
1
UCGE - Control of environmental pollution - analytical methods
1
UVA - Environmental chemicals, hazardous materials - comprehensive works
1
UXN - Radiation protection in nuclear facilities
1
YDM - Commercial law, commercial legislation
1
YEJ - Chemicals legislation
1
YPH - Secretarial work, office management
1
YRB - Social sciences, sociology
1
YRE - Risk assessment
1
ZBEBA - author, title approach
1