Software - Practice and Experience (SPE), Volume 21, 1991

Volume 21, Number 1, January 1991

Volume 21, Number 2, February 1991

Volume 21, Number 3, March 1991

Volume 21, Number 4, April 1991

Volume 21, Number 5, May 1991

Volume 21, Number 6, June 1991

Volume 21, Number 7, July 1991

Volume 21, Number 8, August 1991

Volume 21, Number 9, September 1991

Volume 21, Number 10, October 1991

Volume 21, Number 11, November 1991

Volume 21, Number 12, December 1991