Certified reference materials: Proceedings of ISCRM'89, May 15-18, 1989, Beijing, China / International Academic Publishers - England: International Academic Publishers, 1989 - ix, 339p. ISBN: 9780080375182 Subjects--Topical Terms: Science Subjects--Index Terms: Conference papers proceedings Materials Standards Universal Decimal Class. No.: R 03.5/6 (082.2) / M9