Help with Research on M1 Abrams

[Marc]

I am currently researching the combat performance of the M1 Abrams against Iraqi insurgents during Operation Iraqi Freedom. The research is part of my honors research project in military history at the University of Maryland.

I am having difficulties finding much material on this topic. Does anyone on the boards have suggestions as to where I could find some good sources on the Abrams' performance in Iraq? Thanks!

Abrams' performance during the first weeks of OIF:
http://www.dtic.mil/doctrine/jel/jfq_pubs/1539.pdf

Abrams' performance during the second battle of Fallujah:
http://www.cgsc.edu/carl/download/cs...E7817CDC4FD7=1
http://www.angelfire.com/art2/narod/..._terrain_iraq/

Annual OIF OPTEMPO (Miles per year) of Abrams and other combat systems (see slide 14).
http://www.dtic.mil/ndia/2007combatv...ion28810am.pdf

Regards,

Marc