giới thiệu cẩm nang phòng chống dịch bệnh Covid 19
<iframe frameborder='0' width='240' height='210' title='Cẩm nang phòng, chống Covid-19' src='http://vnbook.com.vn/books/Cam_nang_phong_chong_Covid-19/?zarsrc=31&utm_source=zalo&utm_medium=zalo&utm_campaign=zalo&fbclid=IwAR1r3TRnjdHPC6rpktgRw1gm-VMFHHi1Ni1de1mj4vLKqJ2Y2ydc2GHVkxU' type='text/html' allowfullscreen='true' scrolling='no' marginwidth='0' marginheight='0'></iframe>
<iframe frameborder='0' width='240' height='210' title='Cẩm nang phòng, chống Covid-19' src='http://vnbook.com.vn/books/Cam_nang_phong_chong_Covid-19/?zarsrc=31&utm_source=zalo&utm_medium=zalo&utm_campaign=zalo&fbclid=IwAR1r3TRnjdHPC6rpktgRw1gm-VMFHHi1Ni1de1mj4vLKqJ2Y2ydc2GHVkxU' type='text/html' allowfullscreen='true' scrolling='no' marginwidth='0' marginheight='0'></iframe>