Ergens, Radim <br/><br/>
Parasitic worms and aquatic conditions 

 - Prague  Housing Research and Development Unit  1964 
 - 265p.  25cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Helminthology
<br/><br/><label>LC Class. No.: </label>QL392.S951962