bibliography - Canadian Military History

12,241. 21. Author Unknown. Damage to underground shelters (1940-1942). No Date. PRO HO
191/49.
12,242. 22. Author Unknown. Damage to factory shelters (1942). No Date. PRO HO 191/50.
12,243. 23. Author Unknown. Damage to indoor (Morrison) shelter (1941-1943).No Date. PRO
HO 191/51.
12,246. 26. Author Unknown. Damage to steel-framed buildings. No Date. PRO HO 191/52.
12,249. 29. Author Unknown. Damage to single-storey buildings and sheds. No Date. PRO HO
191/53, PRO HO 191/54 and PRO HO 191/55.
12,252. 32. Author Unknown. Damage to reinforced concrete framed buildings. No Date. PRO
HO 191/56.
12,253. 32A. Author Unknown. Damage to houses (1940-1942). No Date. PRO HO 191/57.
12,269. 8. Author Unknown. Damage to light roofing and walling materials. No Date. PRO HO
191/42.
12,270. 9. Author Unknown. Damage to basement and ground floor shelters (1940-1943). No
Date. PRO HO 191/44.
12,271. 10. Author Unknown. Damage to walls (1940-1942). No Date. PRO HO 191/45 and
PRO HO 191/46.
12,281. 20. Author Unknown. Damage to surface shelters (1940-1943). No Date. PRO HO
191/47 and PRO HO 191/48.
12,282. 21. Author Unknown. Effect of blast on shelters excluding windows and roof lights. No
Date. PRO HO 191/38.
12,289. 28. Author Unknown. Model bombs. No Date. PRO HO 191/39.
12,292. 31. Author Unknown. Plant and machinery. No Date. PRO HO 191/40.
12,294. Unnumbered. Author Unknown. Oil tankers attacked by the enemy. No Date. PRO HO
191/22.
12,295. Unnumbered. Author Unknown. Penetration of HE bombs into multi-storey buildings.
No Date. No PRO number.
12,302. 1. Author Unknown. Effect of bomb explosions on protected and unprotected windows.
No Date. PRO HO 191/16.