1. 'File 8/20: MUSCAT STATE AFFAIRS: RISE OF OMANIS' Date: 1917/1920 Language: English Geographic region: Oman
2. 'File 8/52 MUSCAT STATE AFFAIRS: SHAIKH ISSA BIN SALEH AND HIS FATHER'S CAREER (SHAIKH OF OMAN)' Date: 1930/1930 Language: English