Paramount Gardens, rock garden plants exclusively - Paramount Gardens.; Osmun, Arthur H.; Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Plainfield, New Jersey, Paramount Gardens, [1943?], 1943)
https://www.biodiversitylibrary.org/bibliography/179819
Keywords: Catalogs|New Jersey|Nursery stock|Perennials|Plainfield|Rock plants|