The original link I gave some while ago to the Victorian Veteran's Virtual Museum which included a link to digitised unit war histories has become such a convoluted affair with various changes at the State Library of Victoria, I thought I would repost a more direct link to them.
Not all of the infantry history books have been digitised, some are more recent histories, still subject to copyright, which have had only the covers and list of contents digitised, but still useful for discovering what books are available.