Classification
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AHE - Research and development, research politics - foreign countries
1
AHN - Media and communication science
1
AHPE - Philosophy of Science
1
AHZ - History of science and technology
1
AXA - Geographic surveys - specific countries
1
CHRV - Water and its properties
1
CWE - Chemical engineering, chemical industry - general
1
CX - Fossil fuel technology, special chemicals technology
1
DMC - Computer programs
1
DZC - Man and computer
1
GCAC - Regional geology - noneuropean countries
1
GTA - Hydrology - general
1
GWA - Raw material economy, raw material policy
1
LCK - Ecology - general aspects
1
LWE - Agriculture - general aspects
1
PLA - Astrosciences - general
1
TBD - Microelectronics
1
THD - Design and construction in mechanical engineering
1
TKH - Air flight, space flight
1
TNO - Nuclear reactor safety
1
UCA - Environmental problems, man and environment - general aspects
1
UEDK - Policy of radioactive waste
1
UHP - Protection of nature and landscape
1
UMV - Climatic change
1
UPC - Water - general aspects
1
UPCE - Water chemistry
1
UPT - Water pollution control and measurement
1
UPVC - Groundwater
1
UXL - Radiation protection - general aspects
1
UXNK - Radioactive effluents
1
UXX - Marine disposal of radioactive waste
1
YAB - Law, economy, social affairs - dictionaries
1
YCE - Federal constitutional law
1
YDE - Financial law, budgetary law
1
YDM - Commercial law, commercial legislation
1
YEA - Environmental law
1
YPC - Public administration
1
YPQ - National income accounting
1
YRE - Risk assessment
1
ZBEBB - Subject indexing
1
ZCB - Information science
1