One more thing. On the
website of the Caspar Olevian society (Germany) you will find the content of "Der Gnadenbund Gottes" by Olevianus which is a collection of writings, among them the Bauernkatechismus, but also others.
Let me work on a German reformed literature bibliography of the 16./17. century for a while (couple months???). Maybe we can even turn it into a kind of team effort here on the PB??? Whatcha all think?