Peran asam klorogenat dalam ketahanan tembakau terhadap penyakit lanas (Phytophthora nicotianae var, nicotianae)=The role of chlorogenic on tobacco resistance to black shank disease (Phytophthora nicotaianae var. nicotia - Perpustakaan UGM, i-lib ([Yogyakarta] : Universitas Gadjah Mada, 1999)