1948 retail catalog : hardy ferns, wild and rock garden plants, evergreens - Ferndale Nursery (Askov, Minn.); Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Askov, Minnesota, Ferndale Nursery, 1948, 1948)
https://www.biodiversitylibrary.org/bibliography/186501
Keywords: Askov|Catalogs|Evergreens|Ferns|Minnesota|Nursery stock|Rock plants|Seedlings|