Zeitschrift für Operations-Research, Volume 21

Volume 21, Number 1, February 1977

Volume 21, Number 2, April 1977

Volume 21, Number 3, June 1977

Volume 21, Number 4, August 1977

Volume 21, Number 5, October 1977

Volume 21, Number 6, December 1977

maintained by Schloss Dagstuhl LZI, founded at University of Trier