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Informationstheorie und Werbung
Heyn, Wolfgang, (1966)
Seminar on "Below-the-Line Activities", Noordwijk aan Zee (Netherlands), 19-22 May 1971
(1971)
Seminar on "New Product Development", Today and Tommorow, Dubrovnik (Yugoslavia), 10th-13th October, 1979
(1979)
Using reading quality in magazine selection
Marc, Marcel, (1966)
The choice of media
Bertier, P., (1967)
Choix des medias
Bertier, Patrice, (1968)