Information Display January / February 1968 Vol. 5, No. 1
Information Display March / April 1968 Vol. 5, No. 2
Information Display May / June 1968 Vol. 5, No. 3
Information Display July / August 1968 Vol. 5, No. 4
Information Display September / October 1968 Vol. 5, No. 5
Information Display November / December 1968 Vol. 5, No. 6