Universal decimal classification. Complete English ed., 4th international ed. Prepared in collaboration with the Joint committee of the Association of special libraries and information bureaux and the British society for international bibliography, London, under the auspices of the International commission of the decimal classification, of the International federation for documentation, and with the concurrence of the Education foundation, Lake Placid club, New York. (British standards institution. Reports 1000)
Universal decimal classification. Complete English ed., 4th international ed. Prepared in collaboration with the Joint committee of the Association of special libraries and information bureaux and the British society for international bibliography, London, under the auspices of the International commission of the decimal classification, of the International federation for documentation, and with the concurrence of the Education foundation, Lake Placid club, New York.