Operations Research, Volume 38

Volume 38, Number 1, January / February 1990

Volume 38, Number 2, March / April 1990

Volume 38, Number 3, May / June 1990

Volume 38, Number 4, July / August 1990

Volume 38, Number 5, September / October 1990

Volume 38, Number 6, November / December 1990

maintained by Schloss Dagstuhl LZI at University of Trier