*[http://www.truefreethinker.com/articles/atheism-symbols-atheist-symbols Atheism symbols] by [[True Free Thinker]]
*[http://www.truefreethinker.com/articles/atheism-symbols-atheist-symbols Atheism symbols] by [[True Free Thinker]]
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*[http://www.cem.va.gov/hm/hmemb.asp Atheism and humanism symbols for Placement on Government Headstones and Markers] - United States Department of Veteran Affairs