[Donald S. Fredrickson at a podium] Fredrickson, Donald S. Physicians Dr. Donald S. Fredrickson presents the Jimenez-Diaz lecture in Madrid, Spain. The lecture hall has tiered rows of seating with bench-like desk tops and a mechanism for plugging in headsets behind each seat. Some of the audience are wearing headsets, presumably for translation purposes. On the table in the foreground is a pitcher, a clear bottle, a bottle containing water, drinking glasses, four name plates, and a microphone. Previous lecturers in the audience include Jan Waldenstrom, Hans Krebs, and Andre Cournand. 1974 Congress Portrait Still image 1 photographic print : 21 x 26 cm. color nlm:nlmuid-101445323-img 101445323 http://resource.nlm.nih.gov/101445323 IHM: A027499 English The National Library of Medicine believes this item to be in the public domain: https://creativecommons.org/publicdomain/mark/1.0/