@book{KleemannMeliss1993,
  author    = {Kleemann, Manfred and Meliß, Michael},
  title     = {Regenerative Energiequellen. 2., v{\"o}llig neu bearb. Aufl.},
  publisher = {Springer},
  address   = {Berlin [u.a.]},
  isbn      = {3-540-55085-2},
  pages     = {XXIII, 315 S. : Ill., graph. Darst., Kt},
  year      = {1993},
  language  = {de}
}
@book{Meliss1993,
  author    = {Meliß, Michael},
  title     = {Erneuerbare Energien verst{\"a}rkt nutzen!},
  publisher = {Bundesministerium f{\"u}r Wirtschaft},
  address   = {Bonn},
  pages     = {132 S. : Ill., graph. Darst.},
  year      = {1993},
  language  = {de}
}