Issue No. 11 - November (1981 vol. 14)
N.S. Chang , Hewlett-Packard Design Aids
Integrated pictorial data-base systems need pictorial query languages to enhance their effectiveness. The tabular structures of QPE, IQ, and others are easy to understand and access.
N.S. Chang, K.S. Fu, "Picture Query Languages for Pictorial Data-Base Systems", Computer, vol. 14, no. , pp. 23-33, November 1981, doi:10.1109/C-M.1981.220245