M. WAJID KHAN, MADHU KULSHRESHTHA and. “Impact of Sulphur Dioxide on Root Colonization by VAM Fungi and Nodulation on Blackgram”. Indian Phytopathology 52, no. 2 (June 11, 2002): 182–184. Accessed June 5, 2026. https://epubs.icar.org.in/index.php/IPPJ/article/view/19503.