exhibitions, world expositions, Paris, 1937, preparation, laying of the foundation stone for the pavilion of hygienics, speech of the chairman of the supreme council for public hygienics professor Louis Tanon, right: Health Secretary Henri Sellier, , expo, politics, policy, exhibitions, exhibition, exposition, expositions, Paris International Exposition, Exposition Internationale des Arts et Techniques dans la Vie Moderne, Conseil superieur d'hygiene publique de France, people, group, groups, Third French Republic, medicine, medicines, a, Additional-Rights-Clearance-Info-Not-Available

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