Cacoullos Rena Torres Grammaticization synchronic cariation, and language contact a study of spanish progressive-ndo constructions Cacoullos Rena Torres - Amsterdam John Benjamins Publishing Company 2000 - xv, 255p. cm. - Studies in language companion series . Standard No.: 161,953 Source: Textual Subjects--Topical Terms: LINGUISTICS Dewey Class. No.: P123:3, 111P0