Secondary Sources ~ 1955
| A Comparison of the Heidelberg Catechism with the Westminster Confession and the Augsburg Confession by Burrell Pennings (WCF) | ||
| Denominationalism as a Basis for Ecumenicity: A Seventeenth Century Conception by Winthrop S. Hudson (WA) | ||
| The Five Dissenting Brethren: A Study on the Dutch Background of Their Independentism by Berndt Gustafsoon (WA) |