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
Pullorum disease is recognized as a major disease entity among poultry in this country. Since the discovery of the etiologic agent in 1899, our knowledge concerning the nature of the disease has increased greatly through scientific investigation. These scientific findings have formed a basis for the formulation and application of an effective control and eradication program.
Roekel, H. Van
"Pullorum Disease Control and Eradication,"
Iowa State University Veterinarian: Vol. 13
, Article 5.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol13/iss1/5