Annuaire télex international = Guía internacional telex / compiled from information received from Postal Administrations and Telecommunications Companies of the countries all over the world connected to the internat. telex service and completed by the Publ. ed. inquiries. - Vol. 4, B, Classified trades section. - Darmstadt : Telex-Verlag Jaeger u. Waldmann. - 31 cm. - Frühere Ausg. u.d.T.: Jaeger und Waldmann world telex. - Neueste Ausg. (und frühere Bd.)