A small tweak at Google News makes searching for material from a specific source easier. Let's say you want to find material from the Chicago Tribune containing the keyword, Pentagon. Enter the terms, source first and the query will automatically rewrite itself with the syntax source:Chicago Tribune.
This automatically limits your search to a single source.
You're also given the option to run a search on those specific terms.
Note: In some cases the query will not auto rewrite itself but an option to limit to source is available. For example: a search for the keyword train in The Guardian.
Well-noticed, rubble88. This syntax is the analogue of "site:domain.com word", so source:the_hindu iraq source:new_york_times iraq will show you what those news sources are writing about Iraq, for example.
And if you know the news source, you can just type it first. So cricmania cricket will get rewritten to source:cricmania cricket That let's people restrict their searches without memorizing syntax, but we give them power hints so that they can do a more advanced search next time if they wish.