Helm,M. Michael Hatchery culture of bivalves / A practical manual / M.M. Helm, N.Bourne, Al. Lovatelli - Rome : Food and Agriculture Organization of the United Nations, 2004. - 177 p. : ill.; 30 cm. - FAO fisheries techical paper 471 . ISBN: 92-5-105224-7 Subjects--Topical Terms: Fsheries