Butt, Adnan Ayubi Identification and Analysis of key Determinants (Factors) Causing Customer Churn (Turn Over) among PTCL'S Domestic Customers and Develop Measures as a Framework for their Retention / Adnan Ayubi Butt - Islamabad : CEME - NUST, 2012. - 232 p. ; 30cm. Subjects--Topical Terms: Engineering Management-MS-Thesis Dewey Class. No.: 620.005