J. KUMAR, K.P. SINGH and. “Efficacy of Different Fungicidal Spray Schedules in Combating Apple Scab Severity in Uttar Pradesh Himalayas”. Indian Phytopathology, vol. 52, no. 2, June 2002, pp. 142-7, https://epubs.icar.org.in/index.php/IPPJ/article/view/19486.