A study of the nasopharyngeal bacterial flora of different groups of persons observed in London and South-East England during the years 1930-1937 /
Straker, Edith Alice,author.
Hill, A. Bradford(Austin Bradford),1897-1991
Rosher, Arthur Burch.
Cole, W. T(Author of Some observations on the occurrence of  H. influenza in the trachea),author.
Great Britain.Ministry of Health,issuing body.
Great Britain.His Majesty's Stationery Office.
"April, 1939".