TY - GEN AU - Nirula,S. TI - Effects of ultraviolet pretreatment of some biological factors on the frequency and spectrum of mutations induced by radiations in wheat and sorghum KW - Wheat KW - Sorghum KW - Mutation KW - Radiations KW - Pollen KW - Fertility KW - X-rays KW - Germination KW - Chromosome ER -