1400 per acre from Giant winter rhubarb first season after planting - W.A. Lee (Firm); Lee, W. A.; Henry G. Gilbert Nursery; Seed Trade Catalog Collection. ([Covina, Calif.], W.A. Lee, 1921, 1921)
https://www.biodiversitylibrary.org/bibliography/118911
Keywords: California|Catalogs|Covina|Nursery stock|Rhubarb|