Barrett, Thomas Jason <br/><br/>
Earthworms  their intensive propagation and use in biological soil-building; the earthmaster system ... 

 - 12th ed. 
 - Sun Valley, Calif.  [Earthmaster Publications]  1954. 
 - 60 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earthworms.<br/>Soils