Akwasi Asamoah; Acheampong Atta-Boateng; Kwasi Frimpong-Mensah; Charles Antwi-Boasiako. Efficacy of Extractives from Parts of Ghanaian Pawpaw, Avocado and Neem on the Durability of Alstonia. African Journal of Environmental Economics and Management 2020, 8, 591-595.