1. Taking your lunch out for a picnic? Publication: [Bethesda, Md. : Medical Arts and Photography Branch, National Institutes of Health, 19--?] Subject(s): EatingFood ServicesDrinking
2. Purification of water Publication: [Washington, DC] : War Office, 1943 Subject(s): Water Purification -- methodsDrinkingMilitary Personnel -- educationWarfareWater Pollution