TY - BOOK AU - K.V. Ravishankar AU - R. Uma Shankar Department of Crop Physiology TI - Drought tolerance studies in sunflower (Helianthus annuus L.): Field evaluation of sunflower germplasm for relative drought resi U1 - 630 PY - 1990/// CY - Bangalore PB - University of Agricultural Sciences, Bangalor ER -