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Study on Tetracyclines and Heavy Metals Residues in Pig Feces from Beijing Area
张丽丽, 直俊强, 张加勇, 陈龙, 张卓毅 and 吴迪梅
Chinese Agricultural Science Bulletin . 2014, (35): 74 -78 .  DOI: 10.11924/j.issn.1000-6850.2014-1494