A Comparative study on some nilotic fish species from polluted and nonpolluted aquatic habitats . - Yossif , Ghada Abdel-Raouf .; Yossif , Ghada Abdel-Raouf . (2003)
includes summary in arabic.
Thesis (Ph.D ) -- Menufiya university, 2003.
includes bibliogrphic referance (177-205).
All age.