Cooper, J. I. Virus diseases of trees and shrubs - Oxford : Institute of Terrestrial Scology, 1973 - 74 p. : ilus. LCCN: 29810 Subjects--Topical Terms: Árboles--Enfermedades.Arbustos--Enfermedades.Plantas--Enfermedades por virus. Dewey Class. No.: 634.96 / C6