International patent classification / WIPO - Geneva: WIPO, 1999 - 7th ed. . Vol. 4 (Section D: Textiles; Paper); ISBN: 92-805-0794-X; 69p. ISBN: 92-805-0794-X Subjects--Topical Terms: Library science Subjects--Index Terms: Patent classification Universal Decimal Class. No.: D 025.4PATENt N9