Phelps, E B CONVENIENT METHOD OF PROCEDURE FOR HYGIENIC LABORATORY PHENOL CO-EFFICIENT METHOD. [electronic resource] - American journal of public health (New York, N.Y. : 1912) Oct 1912 - 808-11 p. digital Publication Type: Journal Article ISSN: 0271-4353 Standard No.: 10.2105/ajph.2.10.808 doi