Elliott's bulb offers, 1929 : from now until July 1st, not later - J. Wilkinson Elliott (Firm); Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pittsburgh, Pennsylvania, Elliott Nursery Co, 1929, 1929)
https://www.biodiversitylibrary.org/bibliography/144172
Keywords: Bulbs (Plants)|Catalogs|Flowers|Nurseries (Horticulture)|Nursery stock|Pennsylvania|Pittsburgh|Plants; Ornamental|Shrubs|