Delphinium information book : Hoodacres originating gardens, summer 1937 spring 1938 - Chas. F. Barber (Firm); Hoodacres Delphiniums.; Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Troutdale, Oregon, Chas. F. Barber, [1937], 1937)
https://www.biodiversitylibrary.org/bibliography/166939
Keywords: Catalogs|Delphinium|Nursery stock|Oregon|Roots|Troutdale|