NAVSTAR : GLOBAL POSITIONING SYSTEM (GPS)
ABO EL SOUD, M., YOUSEF, S. (1985). NAVSTAR : GLOBAL POSITIONING SYSTEM (GPS). EKB Journal Management System, 1(A.S.A.T. CONFERENCE 14-16 May 1985 r CAIRO), 1129-1141. doi: 10.21608/asat.1985.26582
M. SAMY ABO EL SOUD; SAYED YOUSEF. "NAVSTAR : GLOBAL POSITIONING SYSTEM (GPS)". EKB Journal Management System, 1, A.S.A.T. CONFERENCE 14-16 May 1985 r CAIRO, 1985, 1129-1141. doi: 10.21608/asat.1985.26582
ABO EL SOUD, M., YOUSEF, S. (1985). 'NAVSTAR : GLOBAL POSITIONING SYSTEM (GPS)', EKB Journal Management System, 1(A.S.A.T. CONFERENCE 14-16 May 1985 r CAIRO), pp. 1129-1141. doi: 10.21608/asat.1985.26582
ABO EL SOUD, M., YOUSEF, S. NAVSTAR : GLOBAL POSITIONING SYSTEM (GPS). EKB Journal Management System, 1985; 1(A.S.A.T. CONFERENCE 14-16 May 1985 r CAIRO): 1129-1141. doi: 10.21608/asat.1985.26582