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2. Factors Which Determine Pollen Content of Air;Balyeat;J. Lab. & Clin. Med,1927
3. Studies in Hay Fever;Barrett;J. Allergy,1934
4. Studies in Atmospheric Pollen of San Francisco;Deamer;J. Allergy,1935
5. Studies on Pollen Content of the Air;Detweiler;J. Allergy,1930