Engler, Adolf Das Pflanzenreich : regni vegetabilis conspectus - Campanulaceae-Lobelioideae Adolf Engler ; Franz Elfried Wimmer - Dehra Dun Bishen Singh Mahendra Pal Singh 1994 - 1024 p. : ill. ; 24 cm Includes Index Subjects--Topical Terms: BotaniqueCampanulaceae Dewey Class. No.: 580 ENG