Dahlgren, Bror Eric, 1877-1961. The Story of food plants / by B.E. Dahlgren. - Chicago : Field Museum of Natural History, 1940. - 32 p., [1] leaf of col. plates : ill., maps ; 22 cm. - Botany leaflet ; 25 . - Botany leaflet (Field Museum of Natural History) ; 25. . Cover title. Bibliography: p. 32. LCCN: s 41000005 Subjects--Topical Terms: Botany, Economic. LC Class. No.: QK1 / .F43 no. 25 TX391 / .D3