Sandhu, K S, et al. “EFFECT OF NITROGEN FERTILIZATION ON YIELD AND CHIPPING QUALITY OF PROCESSING VARIETIES GROWN IN COOLER NORTH INDIAN PLAINS”. Potato Journal, vol. 37, no. 3 - 4, Sept. 2013, https://epubs.icar.org.in/index.php/PotatoJ/article/view/32626.