Professor Ahmad Umar
Department of Chemistry, College of Science and Arts
Promising Centre for Sensors and Electronic Devices
Najran University, Najran 11001, Kingdom of Saudi Arabia
Phone: +966-534-574-597
Fax: +966-7-5442-135
Email: senslett.asp@gmail.com

or

American Scientific Publishers
27013 Mirasol Street
Valencia, California 91355-4957, USA
E-mail: sensorlett@aspbs.com, order@aspbs.com