Comparsion of resorcinol and 5-methylresorcinol copolycondensates with hydroxymethylphenols using GPS/ 13c NMR analysisLippmaa, Helle; Välimäe, T.; Christjanson, PeepNihon Setchaku Kyōkai shi = Adhesion : journal of the Adhesion Society of Japan1988 / p. 255-261