Classification
TEA - Electrical engineering - general
8
THA - Mechanical engineering - general
7
UAD - Environment - comprehensive works
5
GPAB - Flora, vegetation - geographical aspects
3
LED - Botany - comprehensive works
3
THHD - Machine parts
3
MAK - Mathematics - formulae, tables
2
YPB - Economy - general aspects
2
AMAB - Industrial training, further education
1
CHRD - Gases and their properties
1
CHT - Chemistry of solutions and mixtures
1
CHX - Chemical thermodynamics
1
CHXJ - Chemical thermodynamics - special aspects
1
CT - Chemical methods of materials analysis
1
CWA - Chemical engineering - reference books
1
DOIA - Programming language - FORTRAN IV
1
FAAD - Metallic materials - reference books
1
FMXD - Metal hydrogen systems - general aspects
1
GCAA - Regional geology - Germany
1
GHH - Sedimentary petrography - general
1
GHM - Sedimentary rocks
1
GTAK - Hydrogeology
1
LWVC - Plant protection
1
MSU - Economic analysis
1
MWH - Statistics
1
PAD - Physics - comprehensive works
1
PAD - Physik - Handbücher
1
PAK - Physics - formulae, tables
1
PJA - Atomic physics - general
1
TAA - Engineering sciences - reference books
1
TBA - Electronic engineering - general
1
TCL - High frequency engineering
1
THH - Machines
1
THJ - Machining
1
THN - Heat exchanger
1
TKA - Civil engineering - general
1
TKD - Air conditioning, refrigeration
1
URA - Soil chemistry
1
YPD - Business economics
1