C. I. Ogbonnaya. 1994. “GROWTH AND HISTO-CHEMICAL RESPONSE OF <em>GMELINA</em> <em>ARBOREA</Em> SEEDLINGS TO APPLICATIONS OF N AND K FERTILIZERS AND THEIR COMBINATIONS ON OXISOLIC SOIL”. Journal of Tropical Forest Science (JTFS) 6 (4):363-78. https://jtfs.frim.gov.my/jtfs/article/view/1911.