Dr. Yakubu A. Umar King Fahd University of Petroleum & Minerals KFUPM P.O. Box 1615 Dhahran 31261, Saudi Arabia Telephones: Office: 860-2519 Fax: 860-2585 Email: drumar@kfupm.edu.sa
Dr. Yakubu A. Umar
King Fahd University of Petroleum & Minerals
KFUPM P.O. Box 1615
Dhahran 31261, Saudi Arabia
Telephones: Office: 860-2519
Fax: 860-2585
Email: drumar@kfupm.edu.sa