Range:
Subjects: Alexandria (Province); Historic buildings; Mending; Palaces
Subjects: Airplanes; Mending; maintenance.; Mathematical models
Subjects: Mending; maintenance.
Research interests: Mending; Streets; maintenance.
Research interests: Asphalt; Mending; maintenance.
Research interests: Feudalism; History; Mending; Moroccans scientists; Zayyanid dynasty tribe