History pages do not (obviously) refer to searching in old versions of article. There is certainly a way to retrieve article versions one by one, and one could (theoretically) do that in batch mode and search in them locally. And that would be suboptimal wrt both user bandwidth and wikipedia server load. Is there a way to search in old versions of article?
For instance, one knows that there was a version of http://en.wikipedia.org/wiki/Back_to_the_future that contained a reference to http://en.wikipedia.org/wiki/Mall, "twin pines" phrase, "destroyed" word. The date of the version is unknown. How does one find that version starting from http://en.wikipedia.org/w/index.php?title=Back_to_the_Future&action=history?