- Beyond Agnosticism: A Book for Tired Mechanists by Bernard Iddings Bell, 1929
- Agnosticism [microform]: Sermons preached in St. Peter's Cranley Gardens, 1883-4 by Alfred Williams Momerie, 1887
- A THEISTS APOLOGY: A REPLY TO AGNOSTICISM.
- The Way Out Of Agnosticism Or, The Philosophy Of Free Religion by Francis Ellingwood Abbot, 2007-01-17
- Naturalism and Agnosticism by James Ward, 1899
- Reality of God and Religion & Agnosticism.Being the Literary Remains of Baron Friedrich von HÂgel by Friedrich;Edmund G. Gardner, ed. von HÂgel, 1931
- Agnosticism: Contemporary Responses to Spencer and Huxley (Key Issues (Bristol, England), No. 4.)
- Way Out of Agnosticism: Of, the Philosophy of Free Religion (Philosophy in America) by Francis C. Abbot, 1980-06
- Ingersollia -- Memorial Edition:Gems of Thought from the Lectures, Speeches and Conversation of the Late Col. Robert G. Ingersoll, together with a Biographical Sketch and Record of the Death and the Last Sacred Rites of the Great Apostle of Agnosticism by Robert G.; Thomas W. Handford Ingersoll, 1899
- 10 Questions & Answers on Atheism & Agnosticism (PowerPoint presentation) by Dr. Norman Geisler and Alex McFarland, 2007-02-23
- Faith or Agnosticism: The Field Ingersol Debate by Henry M. Field, Robert G. Ingersoll, 1988-03
- The roots of agnosticism by James Seth, 1894
- A reply to agnosticism (Papers for thoughtful readers) by William Bell, 1885
- Lessons of agnosticism by Alfred Thompson, 1880
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