Other sources

This link leads to a recent book on Amazon about Industrial Light and Magic and their history and how they progressed through the years with their special effects making. This looks like a useful source to use/reference for my research.
http://www.amazon.co.uk/Industrial-Light-Magic-The-Innovation/dp/0810998025/ref=sr_1_1?s=books&ie=UTF8&qid=1341394761&sr=1-1

I have also found a link leading to an online PDF document regarding the impact of ILM on film making. I'll be taking a longer look at it at some point either later today or early tomorrow morning. Again, should be helpful.

http://www.darrenpinder.co.uk/content/DarrenPinderDissertation.pdf