21. IOR/L/PS/20/A117/1 Reference (shelfmark): IOR/L/PS/20/A117/1 Title: Military report on Russian Turkistan Simla: General Staff India, 1914 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1914 Extent: xv, 213pp map (in pocket)
22. IOR/L/PS/20/A117/2 Reference (shelfmark): IOR/L/PS/20/A117/2 Title: Military report on Soviet Turkistan Simla: General Staff India, 1929 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1929 Extent: vii, 297pp diags maps (1 in pocket) plans
23. IOR/L/PS/20/A118/1 Reference (shelfmark): IOR/L/PS/20/A118/1 Title: Routes in Sinkiang Simla: General Staff India, 1926 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1926 Extent: xiv, 278, 74pp 1 map (in pocket)
24. IOR/L/PS/20/A118/2 Reference (shelfmark): IOR/L/PS/20/A118/2 Title: Military report on Sinkiang (Chinese Turkestan) Simla: General Staff India, 1929 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1929 Extent: iv, 308pp maps plans sketches (in pockets)
25. IOR/L/PS/20/A118/3 Reference (shelfmark): IOR/L/PS/20/A118/3 Title: Corrections to routes in Sinkiang, 1926 Simla: General Staff India, 1st series, 1927 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1927 Extent: 19pp
26. IOR/L/PS/20/A118/4 Reference (shelfmark): IOR/L/PS/20/A118/4 Title: Corrections to routes in Sinkiang, 1926 Simla: General Staff India, 2nd series, 1929 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1929 Extent: 44pp
27. IOR/L/PS/20/A119 Reference (shelfmark): IOR/L/PS/20/A119 Title: Photographs taken by Lt-Col Sir Percy Sykes to illustrate Chinese Turkestan, the Russian Pamirs and Osh. April-November, 1915 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1915 Extent: 48 photos
28. IOR/L/PS/20/A121 Reference (shelfmark): IOR/L/PS/20/A121 Title: Personalities in Trans-Caucasia. 1919 Simla: General Staff India, 1920 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1920 Extent: i, 181pp
29. IOR/L/PS/20/A122 Reference (shelfmark): IOR/L/PS/20/A122 Title: Who's Who in Central Asia Simla: General Staff India, 1929 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1929 Extent: iii, 158pp
30. IOR/L/PS/20/A123/1 Reference (shelfmark): IOR/L/PS/20/A123/1 Title: Routes in Russian Central Asia, Part I. Trans-Caspia and Khiva Simla: General Staff India, 1922 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1922 Extent: iii, 164pp map (in pocket)