Barrett, Thomas Jason,  1884- <br/><br/>
Earthworms, their intensive propagation and use in biological soil-building;  the Earthmaster system. 

 - [5th rev. ed.] 
 - Roscoe, Calif.,  Earthmaster Publications,  c1948. 
 - 59 p.  illus., port.  23 cm. 
<br/><br/> "An introduction to the more complete textbook, H̓arnessing the earthworm."̓-p. 54.  Pub. 1942 under title: The Earthmaster system for intensive propagation and use of domesticated earthworms. 
<br/><br/><label>LCCN: </label>agr48000512  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earthworm culture.<br/>Soils.
<br/><br/><label>LC Class. No.: </label>SB998.E4  / B35 1948 
<br/><br/><label>Dewey Class. No.: </label>631.45