Filtering by: Contributor Ahmed, Khaled Remove constraint Contributor: Ahmed, Khaled Contributor Williams, Barry Remove constraint Contributor: Williams, Barry Creator Abdel-Aziz Ali, Ali Hassan Remove constraint Creator: Abdel-Aziz Ali, Ali Hassan Resource type http://purl.org/coar/resource_type/c_db06 Remove constraint Resource type: http://purl.org/coar/resource_type/c_db06