Classification
LWO - Agricultural ecology, sustainable agriculture
14
LTV - Green genetic engineering
3
LWE - Agriculture - general aspects
3
UHN - Landscape ecology
2
UKE - Environment and energy resources
2
AHZ - History of science and technology
1
LCN - Ecology - soil sciences
1
LWP - Agriculture - animal husbandry
1
UCA - Environmental problems, man and environment - general aspects
1
UEF - Sustainability
1
UUG - Environmental aspects of genetically modified organisms, viruses, genes
1