Classification
GPAB - Flora, vegetation - geographical aspects
2
GPA - Geobiology - general
1
LEN - Plant physiology
1
LWV - Agriculture - plant protection
1
UCA - Environmental problems, man and environment - general aspects
1
UCEB - Environmental pollution
1
UCJ - Environmental protection - general aspects
1
UML - Air pollution by special sources
1
UVF - Environmental aspects of heavy metals and their compounds
1