- Horsfall, F.L., Jr. and Tamm, I., 1965 Viral and Rickettsial Diseases of Man,
 Fourth Edition, J.P. Lippincott Company, Philadelphia, Montreal. Chapter on
 influenza viruses p.689 written by Thomas Francis, Jr. et al. Hereafter referred to
 as “Horsfall.”
- State of Ohio Griswold Act of 1920.
                    
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