Folder: COS C. 177, March 1971, Visit of Mr. M. Woodger to Yugoslavia, August 1971. Congress of the International Federation for Information Processing. Paper on semantic levels in programming by M. Woodger COS 29/5/01. Folder: COS C. 158. Visit to Copenhagen by M. Woodger, March 1970. Folder: COS 8/6/02, IFIP Working Group 2.3 on Programming Methodology, Part 1, from February 1969. Folder: COS C. 163. Visit of M. Woodger to The Netherlands, August 1970. Folder: COS 8/6/02, IFIP Working Group 2.3 on Programming Methodology, Part 2. April 1971.