Burroughs, Edgar Rice,    1875-1950 <br/><br/>
At the Earth's Core    [electronic resource] / 
Edgar Rice Burroughs 
 -  Project Gutenberg,  1996 
 - Project Gutenberg    545 .
<br/><br/> Public domain in the USA. 
<br/><br/>Text 
<br/><br/><label>Subjects--Index Terms: </label>Adventure stories Science fiction Earth (Planet) -- Core -- Fiction Fantasy fiction 
<br/><br/><label>LC Class. No.: </label>PS