Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
Several years ago there appeared in U) a well-known poultry journal an article on coccidiosis of chickens entitled "Poultry Enemy No. 1." It is not improbable that the author was deservedly subject to a charge of over-emphasis, but on the other hand, it is undeniable that three or four coccidian infections of poultry together constitute a serious menace to poultrymen.
Becker, E. R.
Iowa State University Veterinarian: Vol. 3
, Article 7.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol3/iss3/7