Classification
ZBEBB - Subject indexing
32
LEK - Botany - systematics, taxonomy
31
UVC - Environmental chemicals, hazardous materials - general aspects
23
YEF - Law on hazardous materials
23
LEM - Botany - anatomy, morphology
14
LHX - Bacteria - morphology, systematics
11
LHW - Bacteria - general aspects
10
GPAB - Flora, vegetation - geographical aspects
9
YPB - Economy - general aspects
8
DYA - Artificial intelligence
6
HBA - Medical physics
5
LED - Botany - comprehensive works
5
YDN - Industrial code
5
HBC - Physiological chemistry, biochemistry
4
LOH - Genetics - methods
4
MWH - Statistics
4
ZCA - Documentation
4
DPAD - Data mining, text mining, big data
3
LEA - Botany - reference books
3
LEL - Botany - lower plants
3
LGN - Zoology - anatomy, systematics, embryology
3
MWHL - Modeling, classification, clustering
3
AMA - Education - general
2
ATCB - Classification systems
2
CXUV - Polymers, dyes
2
DYB - Neural networks and computing
2
FNF - Polymer science - general aspects
2
GNA - Geology - soil sciences
2
LAL - Biology - general aspects
2
LCMC - Plants - ecology
2
LCN - Ecology - soil sciences
2
LCO - Hydrobiology
2
LCR - Ecology of microorganisms - land and water
2
LHH - Microbiology - methods
2
LON - Molecular genetics
2
LWH - Agriculture - soil sciences
2
MID - Topology
2
TAA - Engineering sciences - reference books
2
TAT - Engineering Standards
2
ZBEB - Catalogues, cataloguing
2
ZCB - Information science
2
ZCD - Information retrieval
2
AHK - Scientific work
1
ATCC - Indexing methods
1
ATD - Thesauri
1
CAN - Chemistry - mathematical methods, computer applications
1
CEO - Natural organic products
1
CER - Macromolecular compounds - synthesis and reactions
1
CLM - Catalytic processes
1
CWB - Chemical engineering - comprehensive works
1
more ...