Visible Language (The Journal of Typographic Research), Vol 03, 02, April 1969

Content includes:
Letterform Research Needs Definition and Direction, M. E. Wrolstad
Type Variation and the Problem of Cartographic Type Legibility, Barbara S. Bartz
Clues to a Letter’s Recognition: Implications for the Design of Characters, Paul A. Kolers
Visual-motor Skills: Response Characteristics and Pre-reading Behavior, Katherine P. DiMeo
A Standard Code for Typographic Character Identification, Stanley Rice