GM: "The heart of a capital" (1st version 29 pages; 2nd version 25 pages; published in Bouwkundig Weekblad 1964, no 2)
lecture version of "The heart of a capital"; (lecture held for Amsterdam Council of Urban Planning, 10.3.'64 - 1 p.)
2 aerial photographs
policy paper of the municipality 'The inner city' in the Municipal Gazette
newspaper clipping