Author's Organization:Institute Zooprofilattico Sperimentale delle Venezie Aggregato alla Universita:(Pressent address)Laboratory of Epizootiology, College of Agriculture and Veterinary Medicine, Nihon University
Published: December 05, 1983Received: April 22, 1983Available on J-STAGE: February 13, 2008Accepted: September 05, 1983
Advance online publication: -
Revised: -