THE ACQUISITION OF PASSIVE IMMUNITY OF PCV2 OF 1st AND 2nd PARITY SOWS AT BASEDTH DISTRICT,KAMPONG SPEU PROVINCE,កម្រិតអង់ទីករនៃជំងឺ PCV2 លើជ្រូកមេកូនសារទី១ និងទី២ នៅស្រុកបរសេដ្ឋ ខេត្តកំពង់ស្ពឺ THENG YANY,ថេង យ៉ានី VEM THE 2022 B1-574 Or. phnom penh rua 2022 2022 Text x.45p. https://drive.google.com/file/d/1QkQlGSgvPF8r1QfL7OscAUirWj5eXpCK/view?usp=sharing