A study of hrlminthosporium causing broun-spot disease of rice with special refference to its pathogenicity on different varieties of rice plants / Md. Hasan Ashrafuzzaman [MS Thesis] Ashrafuzzaman, Md. Hasan Plants 580 ASM Thesis (MS) -- Department of Botany, University of Dhaka,1957. Includes bibliographical references. Dhaka : University of Dhaka, 1957. 1957. 1957 Text iv, 224p.: eng