An index to church records held at the Landeskirchliches Archiv Stuttgart can be found at this website:
Church book Database. Click on "In der Kirchenbuch datenbank recherchieren"
Link to published church book inventory (1938) for Wuerttemberg "Verzeichnis der württembergischen Kirchenbücher" Gefertigt von Dr. M. Duncker can be found at Wiki.genealogy.net