For your awareness: those are actually the church book duplicates that the priests had to create as civil records after Napoleons reforms and before independent civil records (see German GenWiki page for details), which is important to keep in mind, because they might differ from the originals. For example they had to be handed in, quite soon after creation, so they might lack later additions like notes about recognition, marriage or death. I've also seen at least one case where the duplicate only mentions the witnesses to a baptism, while the orignals only mention the godparents.
A part of the books is situated in Staatsarchiv Freiburg (search link) while the rest is in Generallandesarchiv Karlsruhe (search link).
I've created a bookmarklet (browser bookmark containing javascript code that is executed when you open the bookmark) which creates automatic source citations from these books. You can get it at https://github.com/FlominatorTM/WikiTree (feel free to ask how to use it)
Update: these books are also limited to one confession and are one per town/village, not per parish.