The Purpose of the Church and its Ministry - An online book by H. Richard Niebuhr, Daniel Day Williams, and James M. Gustafson. - http://www.religion-online.org/showbook.asp?title=407
Just and Unjust Wars - Discussion of the differing views of H. Richard Niebuhr and Reinhold Niebuhr expressed in a debate regarding war. - http://www.ucc.org/beliefs/theology/two-famous-brothers-debate.html
H. Richard Niebuhr Online Collections - Offers details on his writings with a special focus study on his book "Christ and Culture". - http://www.centropian.com/religion/academic/theologians/HRNkit/index.html
The Church Against the World - An online book by H. Richard Niebuhr, Wilhelm Pauck and Francis P. Miller. - http://www.religion-online.org/showbook.asp?title=412
The Reconstruction of Faith - Article excerpted from H. Richard Niebuhr’s Faith on Earth: An Inquiry into the Structure of Human Faith. - http://www.religion-online.org/showarticle.asp?title=858
Utilitarian Christianity - Article reprinted from the journal "Christianity and Crisis", July 8, 1946. - http://www.religion-online.org/showarticle.asp?title=399
1994 PCTS Niebuhr Paper - The Fertility of Niebuhr's Idea of Monotheism. - http://www.jedp.com/hrn-pcts.html
H. Richard Niebuhr Papers, 1919-1962 - Offers biographical information on H. Richard Niebuhr, as well as information on his published and unpublished works. - http://www.hds.harvard.edu/library/bms/bms00630.html