Ket qua dieu tra, nghien cuu thanh phan sau, benh hai ca phe che tai mot so tinh phia Bac (nam 2001-2005) Results of investigation of diseases and insects ... Ket qua dieu tra, nghien cuu thanh phan sau, benh hai ca phe che tai mot so tinh phia Bac (nam 2001-2005) Results of...