Looking for resources that relate Congregationalism to the NACCC? Check out:
Principles and Practices: The Congregational Way of the Churches of the National Association by Lloyd M. Hall, Jr. and Karl D. Schimpf
The Basis of Union of the Congregational Christian Churches and the Evangelical and Reformed Church
Karl Barth – Prophet of a New Christianity by Wilhelm Pauck
A Study by the Committee on Free Church Polity and Unity
Congregationalists on the Merger