The reference material I have are the following:
Canadian Military Post Offices To 1993 by W.J. Bailey & E.R. Toop (2nd Ed.)
The Canadian Military Posts / Volume 1 - Colonial Period To 1919 by W.J. Bailaey & E.R. Toop
The Royal Canadian Naval Postal History 1939 - 1945 by Maurice F. Hampson
The Major E.R. Toop Collection of Canadian Military Postal History - Volume 1 to the end of the Second World War published by BNAPS
Canadian Military Postal Markings (2 Volume set) by W.J. Bailey & E.R. Toop
The Wartime Mails & Stamps - Canada, 1939 - 46 by H.E. Guertin
The last one by Guertine is long out of print but might be procured from reputable philatelic book dealers. As far as I know, most of the above other titles should be available.
You might want to Ian Kimmerly or the BNAPS books for sale at
http://www.iankimmerly.com/books/ and the BNAPS website at
http://www.bnaps.org/index.htm .
Chimo
Bujutsu