You can download the charts from online ... or you can buy a reference book.
I love my reference book. Of course I also love reading paper books more than computer/MP3/ CD player/ or Nook books.
My fave reference book: The Quilter's Pocket Reference by Peggy Scholley. You can get it on amazon or ebay or other online outlets as well as many LQS's. It has it all down to HST charts. I love it.
ali