Text ( visual ) : unmediated Formal models in programming : proceedings of the IFIP TC2 Working Confernece on the Role of Abstract Models in Information Processing, Vienna, Austria, 30 January - 1 February 1985 / edited by E. J. Neuhold and G. Chroust. -- Amsterdam : North-Holland , 1985. -- xix, 425 p. ; 24 cm. -- Includes bibliographies. -- ISBN 0444878882 ; (BA00109513) ; https://ci.nii.ac.jp/ncid/BA00109513 Author Heading(s): IFIP TC2 Working Conference on the Role of Abstract Models in Information Processing ; Neuhold, Erich J. ; Chroust, Gerhard ; IFIP Technical Committee 2--Programming. -- Classification(s): LCC : QA76.6 ; DC19 : 005.1. -- Subject Heading(s): LCSH : Electronic digital computers -- Programming -- Congresses ; LCSH : Zemanek, Heinz