Civil engineering procedure 

 - 4th. ed. 
 - London  Thomas Telford  1986 
 - 114 p. : ill. ; 22 cm. 
<br/><br/>p. 109-111 
<br/><br/><label>ISBN: </label>0727703633 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Civil engineering<br/>Engineering--Management