Primary Source
Commentary on the Heidelberg Catechism
Ursinus' authoritative commentary explicates the Heidelberg Catechism's theology, providing systematic Reformed doctrine grounded in catechetical instruction.
Fourth American Edition, Cincinnati: Elm Street Printing Company, 1888. Trans. Rev. G. W. Williard, D.D. (orig. 1851). archive.org: commentaryofzach00ursiuoft
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