Kashfiyot
Xizmatlar
Identifikatsiya
Ishlab chiquvchilar uchun
Ekotizim
5 ta ish
University of the Witwatersrand
Isaac K. Ofori, Dennis Boahene Osei, Paul Alagidede
Muazu Ibrahim, Paul Alagidede
Joseph Owusu Amoah, Paul Alagidede, Yakubu Awudu Sare