TY - BOOK AU - Ziedan,Attia Hosny Hassan TI - Comparative study between hormonal effct and hybridization on the susceptibility of tilapia to infection with ichthyphonus hoferi fungus PY - 1999/// KW - Tilapia KW - Genetics KW - Fishes KW - Diseases N1 - Thesis (M.S.)--Cairo University,1999; Includes bibliographical references (leaves93-112); Microfiche; Cairo, Egypt; ASUNET; 2 microfiches:negative ER -