List of rhododendron cultivar names published in Royal Horticulture Society Rhododendron and Camellia Year Books subsequent to the publication of the International Rhododendron Register in 1958
Subtitle: (thru [!] June 1974 registrations)
By: [compiled and annotated by Edwin K. Parker]
Published: 1974
Place of publication: Astoria, Oregon
Language: eng