Otto.N.E. Bartley.T.R. <br/><br/>
Aquatic Pests on Irrigation Systems 

 - U.S. Department of the Interior  U.S.A.  1965 
 - 72p.  ILL.,and Fig  
<br/><br/><label>Nat. Bib. No.: </label>2999 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering
<br/><br/><label>Universal Decimal Class. No.: </label>626.81;632.9  / OTT