Kashfiyot
Xizmatlar
Identifikatsiya
Ishlab chiquvchilar uchun
Ekotizim
2 ta ish
King Fahd University of Petroleum and Minerals
I.B. Obot, Nestor Ankah, Ahmad A. Sorour +2
Kabiru Haruna, I.B. Obot, Nestor Ankah +2