Classification
LET - Phytopathology
49
LWV - Agriculture - plant protection
34
LWVC - Plant protection
26
LWE - Agriculture - general aspects
16
URA - Soil chemistry
6
LCK - Ecology - general aspects
5
LTV - Green genetic engineering
5
UHP - Protection of nature and landscape
5
UMRC - Effects of air pollution on plants and animals
4
UUD - Ecotoxicology
4
HPT - Toxicology
3
LAA - Biology - reference books
3
LCMC - Plants - ecology
3
LGL - Zoology - general aspects
3
LWVA - Plant disease
3
UCA - Environmental problems, man and environment - general aspects
3
UHN - Landscape ecology
3
UVC - Environmental chemicals, hazardous materials - general aspects
3
UVCH - Accumulation in biomaterial
3
CAU - Laboratory and safety engineering in chemistry
2
GPAB - Flora, vegetation - geographical aspects
2
LAN - Biology - mathematical methods, statistics
2
LENB - Plant physiology - molecular biology, genetics
2
LENS - Plant physiology - stress factors
2
LKU - Biochemistry of specific compounds
2
LONG - Gene expression, regulation
2
LTE - Biotechnology - general aspects
2
LVE - Food science - general
2
LWF - Agriculture - methods
2
LWO - Agricultural ecology, sustainable agriculture
2
LWP - Agriculture - animal husbandry
2
UCJ - Environmental protection - general aspects
2
UCS - Environmental chemistry
2
UPC - Water - general aspects
2
UPN - Water protection, water quality, clean water
2
UPVC - Groundwater
2
UVW - Special effects of hazardous materials
2
YFF - Industrial safety regulations
2
AFK - Research institutions - Germany
1
AYA - Sciences - general aspects
1
CAE - Chemistry - general
1
CTA - Chemical analysis - comprehensive works
1
CTDK - Chemical analysis of single elements
1
CTR - Chromatography
1
CTS - Gas chromatography
1
CTY - Analytical problems
1
CUA - Spectroscopy
1
GNA - Geology - soil sciences
1
GPA - Geobiology - general
1
GSC - Remote sensing
1
more ...