Spellerberg, I.F. Pritchard, A.J. Ecology,ecosystem management and biology teaching - UNESCO 1984 - 62 - Ecosystem management Biology teaching Environmental education = Spellerberg, I.F. Standard No.: M Standard Tech. Report. No.: LCCN: B Nat. Bib. No.: P-0486 Nat. Bib. Agency Control No.: 577.4 SPE Subjects--Topical Terms: Environmental Sciences Universal Decimal Class. No.: 577.4