Karl L. Zinn Languages for programming conversational use of computers in instruction. [Citation Graph (0, 0)][DBLP] IFIP Congress (2), 1968, pp:1388-1394 [Conf]
Karl L. Zinn Computers in the Instructional Process: Directions for Research and Development. [Citation Graph (0, 0)][DBLP] Commun. ACM, 1972, v:15, n:7, pp:648-651 [Journal]
Karl L. Zinn Requirements for Effective Authoring Systems and Assistance. [Citation Graph (0, 0)][DBLP] International Journal of Man-Machine Studies, 1974, v:6, n:4, pp:381-400 [Journal]
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