B. M. SINGH, R. P. KAUSHAL and. “Heritability of Resistance in Urdbean to Leaf Spots Caused by Cercospora Canescens”. Indian Phytopathology, vol. 44, no. 1, Jan. 2002, pp. 131-2, http://epubs.icar.org.in/index.php/IPPJ/article/view/21842.