--subdivision Health and hygiene under ethnic groups and classes of persons; and subdivision Health aspects under topics and individual wars, e.g. Recreation areas--Health aspects; World War, 1939-1945--Health aspects
--subdivision Sanitation under subjects, e.g. Ships--Sanitation; Theaters--Sanitation; subdivision Sanitary affairs under names of individual military services, e.g. United States. Army--Sanitary affairs; and subdivision Health aspects under individual wars, e.g. World War, 1939-1945--Health aspects