Resinous Prod.and Chem.Co. Patent: US2390918 , 1943 ; Full Text Show Details Kloetzel Journal of the American Chemical Society, 1948 , vol. 70, p. 3574 Full Text Show Details Resinous Prod.and Chem.Co. Patent: US2342119 , 1941 ; Full Text Show Details Leonard; Beck Journal of the American Chemical Society, 1948 , vol. 70, p. 2506