00501nam a2200145Ia 4500001001100000005001700011008004400028020001500072245010800087260008300195300002100278650001500299650002400314999001700338000001608320251012174743.0         2001    ne                       c  a909072111900aSecretariat of the convention on Biological Diversity (2001)Series No4bThe value of forest ecosystems   aMontreal, CanadabSecretariat of the convention on Biological Diversityc2001   av, 60 p.c28 cm.00aEcosystems00aForest and forestry  c10031d10031