Simak, Clifford D.,  1904-1988 <br/><br/>
The World That Couldn't Be  [electronic resource] / 
Clifford D. Simak 
 -  Project Gutenberg,  2010 
 - Project Gutenberg  32026 .
<br/><br/> Public domain in the USA. 
<br/><br/>Electronic text 
<br/><br/><label>Subjects--Index Terms: </label>Human-alien encounters -- Fiction Hunting stories Science fiction Farmers -- Fiction 
<br/><br/><label>LC Class. No.: </label>PS