SACHAN, S.N. (2002) “Phenological spectrum and perennation of powdery mildew fungi of Doon Valley-I-Erysiphe”, Indian Phytopathology, 44(1), pp. 121–123. Available at: https://epubs.icar.org.in/index.php/IPPJ/article/view/21837 (Accessed: 5 June 2026).