A revised and updated version of
Abraham Kuyper: An Annotated Bibliography 1857-2010 by Tjitze Kuipers (2011)

You can buy a printed edition of this book on the site of the publisher.

1966

[Letters.]
In: Herman Bavinck en zijn tijdgenoten. [Door] Dr. R.H. Bremmer.
Kampen, J.H. Kok 1966, pp. [282]–292.
See also: 1961.01.

Twenty-eight letters and postcards to H. Bavinck, written from December 13, 1891 to March 17, 1918, are reprinted in appendix 2. Twelve of these letters are also reprinted in full elsewhere in the book as sources and clarification for the argument; other excerpts are frequently cited as well.