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
A survey of the incidence of bovine leptospriosis in 15 counties in Iowa was made using the rapid plate and capillary tube test as developed by Stoenner. A statistical correction technique was applied in an effort to approximate the true incidence.
Carbrey, E. A.
"Incidence of Bovine Leptospriosis in Iowa,"
Iowa State University Veterinarian: Vol. 21
, Article 7.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol21/iss1/7