Rubber Manufacturers Association Natural rubber buying: discussions of crude rubber quality problems of Rubber Manufacturers in U.S. during the Course of Industry-wide Seminars (Book) - Washington, D.C. Rubber Manufacturers Association 1953 - 97 p. 23 cm. Subjects--Topical Terms: Rubber Universal Decimal Class. No.: 678.032 : 658.7 : 658.562 RUB / 2172