International bibliography of dictionaries. Fachworterbucher und Lexika; ein internationales Verzeichnis. [Editorial direction: Helga Lengenfelder] - 5th, rev. ed. - New York, R.R. Bowker Co., 1972. - 511 p. 22 cm. LCCN: 72214468 Subjects--Topical Terms: Encyclopedias and dictionaries--Bibliography. LC Class. No.: Z7004.D5 / I55 1972