From this link you can also link to the full opinion.
There are lots of good books out there on the Supreme Court and its important decisions. The very best, in my opinion, is Laurence Tribe's "American Constitutional Law", but that's pretty expensive and covers more than the First Amendment, which is really what we all are most interested in on a day-to-day basis.
There's also a book called "May It Please The Court" that contains actual transcripts of some key arguments before the S.C. and I'm pretty sure this is the one that also has a CD with some of the arguments on it. Very instructive.
Peace.
~ ~ ~ All meetings end in separation All acquisition ends in dispersion All life ends in death - The Buddha