Information Processing Letters, Volume 34

Volume 34, Number 1, 22 February 1990

Volume 34, Number 2, 16 March 1990

Volume 34, Number 3, 9 April 1990

Volume 34, Number 4, 24 April 1990

Volume 34, Number 5, 7 May 1990

Volume 34, Number 6, 28 May 1990