Pyriadi, T. M.; Al-Tamimi, E. O.; Al-Farajy, G. H. SYNTHESIS AND CHEMICAL MODIFICATINON OF NOVOLAC VIAINCORPORATION OF SILICON, PHOSPHOROUS, BORON, SULFUR ANDSOME ORGANIC COMPOUNDS. Al-Nahrain J. Sci. 2018, 12 (4), 58-71.