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Ecology
E ́cologie
28
Ecologie
22
Zeitschrift
17
Environment
9
O ̈kologie
9
Environnement
8
Pollution
8
Environmental policy
7
42.90 ecology: general
6
Conservation of natural resources
5
Environmental Pollution
5
Environmental protection
5
Human ecology
5
Microbial ecology
5
Microbiology
5
Nature
5
Protection
5
Animal ecology
4
Biology
4
Environmental sciences
4
Natural history
4
Pe ́riodiques
4
Chemistry
3
Conservation
3
E ́cologie animale
3
E ́cologie microbienne
3
Entomology
3
Environmental Health
3
Environmental Monitoring
3
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