At the request of the President of the Polk County Medical Society in November of last year, 1905, I made a little investigation into the bacteriological conditions of the school buildings of Des Moines.
Proceedings of the Iowa Academy of Science
©1906 Iowa Academy of Science, Inc.
Ross, L. S.
"An Observation on the Number of Bacteria In Des Moines School Buildings,"
Proceedings of the Iowa Academy of Science, 13(1), 21-23.
Available at: https://scholarworks.uni.edu/pias/vol13/iss1/8