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CE13.R19 : Change of date of the V Meeting of the Directing Council
(Washington, D.C; Pan American Sanitary Bureau, 1951-04)
CE13.R20 : First Inter-American Congress of Public Health
(Washington, D.C; Pan American Sanitary Bureau, 1951-04)
CE13.R18 : Rotation every 5 years of the site of the sector offices of the Pan American Sanitary Bureau
(Washington, D.C; Pan American Sanitary Bureau, 1951-04)