David, I guess you'll have to come to Germany and visit the Herborn library, wher Alsted and Piscator and many others were at home. See here. You will find many German originals there, and many pearls of great prize!

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Sebastian Heck
PCA & Evangelisch-reformierte Kirche Deutschland
Ph.D. student at Theological Universiteit Apeldoorn/Netherlands
Church Planting in Germany
Reformation2Germany