This 69 page document is part of the WHO Information Series on School Health. It provides information that will assist educators in promoting and implementing oral hygiene programs in schools.
http://new.paho.org/hq/dmdocuments/2009/OH_st_sch.pdf
پیرامون این منبع
به زبانهای زیر موجود است
نوع منبع
نویسنده
جواز/مجوز
