Rivero, Juan A. La productividad del mar in Agricultura de Puerto Rico. Publication for the year 1963. - San Juan, P.R. 1963. - Enero-Junio, 1963. Vol. 50. no.1. p. 4-18 "Reprinted". At head of title ...Departamento de Agricultura. LCCN: fel36001833 Subjects--Topical Terms: Marine resourcesMarine botany. Subjects--Geographic Terms: Puerto Rico