Pearson, C. J. Agronomy of grassland systems / C J. Per arson and R. L. Ison. - 2nd ed. - UK : CUP, 1997. - xii, 222p ; 26cm. Includes bibliographical references and index. Open. ISBN: 0521560101 LCCN: 9645572 Subjects--Topical Terms: Pastures.Grasses.Range management.