Epidemic Respiratory DiseaseNote 9 — Chapter I · THE ETIOLOGY OF INFLUENZAReading editionWollstein: Jour. Exper. Med., 1916, viii, 681.◇Copy noteReturn to CHAPTER I THE ETIOLOGY OF INFLUENZAReturn to CHAPTER I THE ETIOLOGY OF INFLUENZAReturn to CHAPTER I THE ETIOLOGY OF INFLUENZA