Sharpley, Andrew N. Agriculture and phosphorus management : the Chesapeake Bay /ed. by Andrew N. Sharpley - Boca Raton, Florida : Lewis publishers, 1999. - 229 p. : gráfs. ISBN: 1566704944 LCCN: 82686 Subjects--Topical Terms: Agua--Calidad.Fósforo--Efecto en suelos. Dewey Class. No.: 631.85 / S4