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*1112 $aSymposium on the Productivity of Forest Ecosystems$0(NO-TrBIB)8008983$_107347900
*24510$aProductivity of forest ecosystems :$bproceedings of the Brussels symposium organized by Unesco and the International Biological Programme (27-31 October 1969) = Productivité des écosystèmes forestiers$cedited by P. Duvigneaud
*24631$aProductivité des écosystèmes forestiers
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*4901 $aEcology and conservation$v4
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*650 0$aForest ecology$xCongresses$_97077600
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*7001 $aDuvigneaud, Paul$0(NO-TrBIB)8008982$_107348100
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