The PRC was founded as a separate denomination of Reformed churches in 1924 over disputes between Herman Hoeksema and the Christian Reformed Church's understanding of common grace. Particular emphases include the absolute sovereignty of God and the antithesis between the Christian and the world.
The Protestant Reformed Churches are Reformed, Calvinistic Churches which maintain the doctrines of grace and hold to the three forms of Unity: the Heidelberg Catechism, the Belgic Confession, and the Canons of Dordt. http://www.prca.org
An independent, non-profit publishing association affiliated with the Protestant Reformed Churches of America. They publish a semi-monthly periodical and many Reformed books in the Calvinistic tradition. http://www.rfpa.org/Scripts/