bibliography - Canadian Military History

12,457. 27. Author Unknown. Effect of the human element on telling under operational
conditions. No Date. No PRO number.
12,458. 28. Author Unknown. Effect of the human element on telling under operational
conditions. No Date. No PRO number.
12,459. 29. Author Unknown. Interception tables at Sectors. April 1940. PRO AVIA 7/198.
12,460. 30. Author Unknown. Raid blocks and symbols for Group and Sector Operational
Rooms. No Date. No PRO number.
12,461. 31. Author Unknown. Rubber maps for Operations Room tables M. No Date. No PRO
number.
12,462. 32. Author Unknown. Controlled interception. No Date. No PRO number.
12,463. 33. Author Unknown. Display of raid information at Group Operations Rooms. May
1940. No PRO number.
12,464. 34. Author Unknown. Report on visit to Wick. May 1940. PRO AVIA 7/198.
12,465. 35. Author Unknown. Suggested method of controlling flights at Dyce and Montrose.
April 1940. PRO AVIA 7/198.
12,466. 36. Author Unknown. Progress of Operational System Research and proposed research
programme. May 1940. No PRO number.
12,467. 37. Author Unknown. Report on raids on Yorkshire, 25 May 1940. No Date. No PRO
number.
12,468. 38. Author Unknown. Investigation of raid X6 of 30 May 1940. No Date. No PRO
number.
12,469. 39. Author Unknown. Errors in plotting, telling, and recording under operational
conditions. No Date. No PRO number.
12,470. 40. Author Unknown. Errors in plotting, telling, and recording under operational
conditions. No Date. No PRO number.
12,471. 41. Author Unknown. Improvement of accuracy of height determination by Observer
Corps. No Date. No PRO number.
12,472. 42. Author Unknown. Instrument of easy construction for determination of height of
aircraft for use by Observer Corps in "black areas". No Date. No PRO number.