00340nam a2200133Ia 450000500170000008000180001710000210003524500700005626000220012630000100014858300190015894200120017799900170018920260716043100.0  a18.01.01 S446  aSecretan, P.A.D.  aAquaculture and risk management/ By P.A.D. Secretan and C.E. Nash  bFAOaRomeITc1989  a32 p.  c3/7/00kM2LMGR  cMmS446  c39963d39963