[1] | Global livestock counts. Counting chickens. Where the world’s livestock lives. July 27, 2011. The Economist. https://www.economist.com/graphic-detail/2011/07/27/counting-chickens.https://www.economist.com/graphic-detail/2011/07/27/counting-chickens |
[2] | Centers for Disease Control and Prevention. MMWR 2011; 60(Suppl):1 − 120. https://www.cdc.gov/mmwr/pdf/other/su6004.pdf |
[3] | Chao Ma, Rodewald L, Lixin Hao, Qiru Su, Yan Zhang, Ning Wen, et al. Progress Toward Measles Elimination — China, January 2013-June 2019. China CDC Weekly 2019;1(2):21 − 5. http://weekly.chinacdc.cn/en/article/ccdcw/2019/2/21.http://weekly.chinacdc.cn/en/article/ccdcw/2019/2/21 |