Report of the Eleventh Session of the Working Party on Resource Eval uation, Accra, Ghana, 24-26 September 1997. - Accra : FAO, 1998. - vi, 72 p. : ill. ; 29 cm. - FAO Fisheriies Report ; No. 569. . Includes bibliography : p. 64. Subjects--Topical Terms: Fishery resources.--Statistics.------Acoustical engineering--Statistics.------Fisheries --Statistics.------