L'environnement = Umwelt.
CKS Consortium.
Cambridge : CKS Consortium,
c1995.
3 video cassettes -- 2 sound cassettes -- 2 3.5" computer disks -- 1 CD-ROM -- 4 Information and instruction leaflets (Using CKS French materials ; Information on how to access and print out CKS French files ; Information on how to access and print out CKS German files ; TLTP Project 33)