Natural high polymers / by C. T. Greenwood and E. Ann Milne. Greenwood, C. T. (Charles Trevor) Milne, Elizabeth Ann, joint author. Polymers. QD281.P6 547.84 GRN Edinburgh ; London : Oliver & Boyd, c1968. c1968. 1968 Text vii, 128 p. : eng Contemporary science paperbacks, 18