Gordon T. Uber, Paul E. Williams, Bradner L. Hisey, Robert G. Siekert. The organization and formatting of hierarchical displays for the on-line input of data. In American Federation of Information Processing Societies: Proceedings of the AFIPS '68 Fall Joint Computer Conference, December 9-11, 1968, San Francisco, California, USA - Part I. Volume 33 of AFIPS Conference Proceedings, pages 219-226, AFIPS / ACM / Thomson Book Company, Washington D.C., 1968. [doi]
Abstract is missing.