TY - JOUR AU - Rosenwald, A. S. AU - Zander, D. V. TI - Infectious bronchitis control: Immunization of chicks by willful infection protects laying hens from disease which may be costly to table egg producers JF - California Agriculture JO - Calif Agr Y1 - 1955/06/01 VL - 9 IS - 6 SP - 12 EP - 13 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v009n06p12 AB - The following article is a report of progress in a long term field study conducted by the University of California. The laboratories of the California Department of Agriculture cooperated with counsel and by making determinations of disease conditions during these trials. Farm Advisors W. F. Rooney, Tulare County, Ralph Pfost, Fresno County, W. W. Mitchell, Sacramento County, and Dr. M. A. Nilson, acting extension poultry pathologist, helped plan and conduct the trials.