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Ruttayaporn Ngasaman. (2007) Prevalence of Salmonella in breeder sows in Chiang Mai, Thailand . Chiang Mai University/Chiang Mai.
Ruttayaporn Ngasaman. Prevalence of Salmonella in breeder sows in Chiang Mai, Thailand. . Chiang Mai:Chiang Mai University, 2007.
Ruttayaporn Ngasaman. (2007) Prevalence of Salmonella in breeder sows in Chiang Mai, Thailand . Chiang Mai University/Chiang Mai.