PANDEY, R.N., and B.H. GIRISH. “EXTRACTANTS AND CRITICAL LIMITS OF AVAILABLE SOIL SULPHUR FOR MUSTARD (BRASSICA CAMPESTRIS VAR. TORIA)”. Annals of Agricultural Research, vol. 27, no. 4, Mar. 2014, https://epubs.icar.org.in/index.php/AAR/article/view/42397.