Murphy M I, Neter E, Olson T A, Press E, Steele J H, Yerby A S, Yoder F D, Mattison B F, Byers D H, Huenemann R L, Kilcawley E J, Knutson A L, Langmuir A D, Mitchell G E, Morre F E, Hilbert M S
University of Michigan School of Public Health, Ann Arbor, Mich.
Am J Public Health Nations Health. 1967 Feb;57(2):319-20. doi: 10.2105/ajph.57.2.319.