and R.C. GUPTA, M.L. UPADHYAYA*, PRAKASH VERMA. 2008. “Alternaria Leaf Spot on Ginkgo Biloba in Kumaun Himalaya, Uttarakhand”. Indian Phytopathology 61 (4): 530. https://epubs.icar.org.in/index.php/IPPJ/article/view/12872.