INFECTIOUS LARYNGOTRACHEITIS CARRIERS 173 



References 



Beach, J. R. 1930. The virus of laryngolracheitis of fowls. Science 72:633-634. 



Beach, J. R. 1931. Personal communication to W. R. Hinshaw, in A survey 

 of infectious laryngotracheitis of fowls. Calif. Agr. Expt. Sta. Bui. 

 520, p. 26. 



Beaudette, F. R. 1930. Bronchitis in poultry. N. J. Agr. 12 (5) :3-4. 



Gibbs, Charles S. 1931. Infectious trachitis. Mass. Agr. Expt. Sta. Bui. 273. 



(iraham, Robert, Frank Thorp, Jr., and W. A. James. 1931. \ filterable virus- 

 like agent in avian laryngotracheitis. Jour. Amer. Vet. Med. Assoc. 

 78 (n.s.31):506-517. 



Graham, Robert, and Frank Thorp, Jr. 1931. A laryngotracheitis syndrome in 

 a wild goose associated with pneumomycosis. Jour. Amer. Vet. Med. 

 Assoc. 79 (n.s.32):90-94. 



Komarov, A., and F. R. Beaudette. 1931. Some observations on the distribu- 

 tion of virus in the body of birds affected with infectious bronchitis 

 with special reference to the carrier state. Poultry Sci. 10 (7):391. 



Srtift, Homer F. 1921. Preservation of stock cultures of bacteria by freezing 

 and drying. Jour. Expt. Med. 33:69-75. 



Acknowledgments 



In conclusion, the writer wishes to extend his sincere thanks to Dr. J. R. 

 Beach of the University of California and to the Rockefeller Institute for Medical 

 Research for contributing the California and New Jersey viruses of infectious 

 laryngotracheitis used in this study. 



Publication of this Document Approved by Commission on Administration and Financi; 

 4M-1-32 No. 4477 



