NAGI, K. S., and A. S. KHEHRA. “EFFECT OF SELECTION ON THE COMPONENTS OF GENETIC VARIABILITY FOR GRAIN YIELD AND ITS COMPONENTS UNDER TWO PLANT DENSITIES IN MAIZE (ZEA MAYS L.)”. INDIAN JOURNAL OF GENETICS AND PLANT BREEDING, vol. 56, no. 02, May 1996, pp. 129-36, doi:.