00601cam a22002171 4500 sa 63002702 DLC 20260227111935.0 820218s1962 ii a 000 0 eng sa 63002702 (OCoLC)8167516 DLC OAkU DLC premarc TS1890 .H475 1962 Helen, John, 1878- From theory to practice in rubber fabrication. Rev. ed. of volumes I & II. Kottayam, Printed at the C. M. S. Press [1962?] 671 p. illus. 23 cm. Rubber. 54611 54611