1. A survey of the pollen flora in Baltimore during 1929
2. Factors which Determine the Pollen Content of the Air;Balyeat R. M.;The Journal of Laboratory and Clinical Medicine,1927
3. Studies in Hay Fever;Barrett C. E.;The Journal of Allergy,1932
4. Cedar hay fever
5. C. H.Blackley: “Experimental Researches on the Cause and Nature of Catarrhus Aestivus” 1873; “Hay Fever: Its Causes Treatment and Effective Prevention” 1880.