@techreport{SpangenbergSchmidtBleek1995, type = {Working Paper}, author = {Spangenberg, Joachim H. and Schmidt-Bleek, Friedrich}, title = {Welche Indikatoren braucht eine nachhaltige Entwicklung?}, series = {Wuppertal Papers}, volume = {48}, institution = {Wuppertal Institut f{\"u}r Klima, Umwelt, Energie}, address = {Wuppertal}, pages = {13}, year = {1995}, language = {de} }