Author's Organization:Kenpoku Livestock Hygiene Service Center Kyushu Branch Laboratory, National Institute of Animal Health Kenpoku Livestock Hygiene Service Center Kenpoku Livestock Hygiene Service Center Kyushu Branch Laboratory, National Institute of Animal Health
Published: December 15, 1990Received: February 15, 1990Available on J-STAGE: February 14, 2008Accepted: August 20, 1990
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