A basic tool for looking up a specific page in the Schaff Church Fathers collection on CCEL. If you enter volume or page numbers higher than exist in that series or volume, you will get a link that is properly formatted but for a page that doesn't exist.
The first series of the Nicene and Post-Nicene is just Augustin and Chrysostom. The other Nicene and Post-Nicene Fathers included in the set are found in the second series.