Operations Research, Volume 23

Volume 23, Number 1, January / February 1975

Volume 23, Number 2, March / April 1975

Volume 23, Number 3, May / June 1975

Volume 23, Number 4, July / August 1975

Volume 23, Number 5, September / October 1975

Volume 23, Number 6, November / December 1975

maintained by Schloss Dagstuhl LZI, founded at University of Trier