author = { Bolc, Leonard },

title = { Natural language question answering systems },

publisher = {Hanser},

isbn = {3446129782},

isbn = {0333295285},

keywords = { Mensch-Maschine-Kommunikation , Natürliche Sprache , Sprache , Computer , Sprachverarbeitung , Künstliche Intelligenz },

year = {1980},

booktitle = {Natural communication with computers},

address = { München },

url = { http://slubdd.de/katalog?TN_libero_mab2 }