@techreport{BringezuRitthoffStegeretal.2015,
  author    = {Bringezu, Stefan and Ritthoff, Michael and Steger, S{\"o}ren and Bahn-Walkowiak, Bettina},
  title     = {Rohstoffversorgung und Ressourcenproduktivit{\"a}t in der deutschen Zementindustrie : Analyse des Status quo und Perspektiven},
  institution = {Wuppertal Institut f{\"u}r Klima, Umwelt, Energie},
  address   = {Wuppertal},
  pages     = {54},
  year      = {2015},
  language  = {de}
}