Author's Organization:Nagano Livestock Hygiene Service Center Department of Disease Control, School of Veterinary Medicine, University of Zambia Department of Disease Control, School of Veterinary Medicine, University of Zambia
Published: June 15, 1992Received: November 06, 1991Available on J-STAGE: February 15, 2008Accepted: February 20, 1992
Advance online publication: -
Revised: -