1. PRESCOTT S. C. AND PARKER M. E. 1927 Use of blood agar in control of milk supplies. 16th Ann. Rept. Int. Assoc. Dairy and Milk Inspectors.
2. Physiological youth in bacteria;SHERMAN J.M.;Jour. Bacteriol.,1923
3. Standard Methods of Milk AMalysis. 1927. 5th ed. American Public Health Association.
4. The proportion of viable bacteria in young cultures, with special reference to the technique employed in counting;WILSON G. S.;Jour. Bacteriol.,1922
5. How accurate is the quantitative plate count? (Abstract.) Jour;WRIGHT W^.;Bacteriol,1927