Diseases and insect pests of rhododendron and azalea
Davis, Spencer H., Hamilton, C.C.
Diseases and insect pests of rhododendron and azalea - New Brunswick 1955 - 30 p. - No. 571; New Jersey Agricultu .
Diseases and insect pests of rhododendron and azalea - New Brunswick 1955 - 30 p. - No. 571; New Jersey Agricultu .