Various <br/><br/>
The Project Gutenberg Collection of Works by Freethinkers :  With Linked On-line and Off-line Indexes to 157 Volumes by 90 Authors; Plus Indexes to 15 other Author's Multi-Volume Sets. 

 - 1 online resource :  multiple file formats 
<br/><br/> Release date is 2012-11-23 
<br/><br/>Produced by David Widger  Produced by David Widger 
<br/><br/>
<br/><br/><label>Subjects--Index Terms: </label>Free thought 
<br/><br/><label>LC Class. No.: </label>BL