Classics of free thought / 
edited by Paul Blanshard. 
 - Buffalo, N.Y. :  Prometheus Books,  1977. 
 - xi, 190 p. ;  23 cm. 
<br/><br/> Titles on cover : Berrand Russell--Julian Huxley--Mark Twain--Robert Ingersoll--Thomas Jefferson--Voltaire--John Sruart Mill--Thomas Paine--Charles Darwin and many others. 
<br/><br/><label>ISBN: </label>0879750715 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Free thought--Addresses, essays, lectures.