If you want to learn about one of, if not the best exercise/tests of strength, Andy Bolton's ebook covers it all.
If you want free (three parts):
http://www.t-nation.com/free_online_article/sports_body_training_performance/mastering_the_deadlift_part_i
http://www.t-nation.com/readArticle.do?id=1588392
http://www.t-nation.com/readArticle.do?id=1607555
