Diseases and insects of roses and their control
Johnson, W.T., Dimock, A.W., Naegele, J.A.
Diseases and insects of roses and their control - Ithaca 1963 - 1-8 p. - New York College of Agricultural .
Diseases and insects of roses and their control - Ithaca 1963 - 1-8 p. - New York College of Agricultural .