Artificial reproduction and pond rearing of the African catfish Clarias gariepinus in sub-Saharan Africa: A handbook

af Graaf, Gertjan de
Udgivet 1996

Floods fish and fishermen : Eight Years experiences with flood plain fisheries, fish migration, fisheries modelling and fish bio diveristy in the comparmentalization pilot project, Bangladesh

af Graaf , Gertjan de
Udgivet 2001