Beetschen, Lee J. <br/><br/>
Evaluation of trenchless sewer constrution at south bethany branch, Delaware  / 1978 
Lee J. Beetschen and William C. Henry 
 - Washington :  Government Printing Office,  1978 
 - xii, 82 p. :  ill. ;  28 cm. 
 - Environmental protection series .
<br/><br/> EPA-600/2-78-022 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewer<br/>Pollution
<br/><br/><label>Dewey Class. No.: </label>628.21