Classification
LCP - Limnology
9
UPVF - Surface waters - streams, rivers, lakes
UHN - Landscape ecology
3
GCAA - Regional geology - Germany
2
GTA - Hydrology - general
2
GPAC - Aquatic biology - geographical aspects
1
LCL - Biotopes, ecosystems
1
UCA - Environmental problems, man and environment - general aspects
1
UHP - Protection of nature and landscape
1