Filtering by: Creator El-Ghitany, Shawky El-Shahat Remove constraint Creator: El-Ghitany, Shawky El-Shahat Date 1989 Remove constraint Date: 1989 Type Thesis Remove constraint Type: Thesis Resource type http://purl.org/coar/resource_type/c_db06 Remove constraint Resource type: http://purl.org/coar/resource_type/c_db06