If the pages you are getting are a waste, you are seeing the same things over and over, knock off and go back and put some new, different words in your search. The fellow who wrote this page is in graduate physics at UVa. If not, check the citation discussions at Yahoo. The Internet is very fluid and a site might not be there tomorrow. Tree-base Look, books have been around for 543 years, since Gutenberg's Bible .
Books are good, books are useful.
Sometimes they are better and faster than the Internet. If you haven't found what you need on the Net in 20 minutes its time to rethink your attack or grab a good book. The web, for instance, is not a great source for literary criticism and analysis of dead authors. It is good for something like global warming or disappearing whales. Think about who cares about your subject.