Haemophilus Infections in Chickens : 2. Types of Haemophilus paragallinarum Isolates from Chickens with Infectious Coryza, in Relation to Haemophilus gallinarum Strain No.221 - SAWATA, Akira; NAKASE, Yasukiyo; KUME, Katsumi (The Japanese Journal of Veterinary Science, 1978)