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42.90 ecology: general
1
E ́cologie
1
ECOLOGY
1
Ecologie
1
Ecologie humaine
1
Ecology
Effect of human beings on
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Environmental Monitoring
1
Environmental Pollution
1
Environmental aspects
1
Environmental protection
1
Homme
1
Human ecology
1
Industrie
Industries
1
Influence sur la nature
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Nature
1
Pollution
Protection de l'environnement
1
Publications pe ́riodiques
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1Publicado 1979Materias: “...Environmental protection Periodicals....”
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