Agol ,R. <br/><br/>
textbook of surveying and levelling /8th ed. 

 - 8th ed. 
 - New Delhi  Khanna Publishers  1997 
 - xxii,968p. 
<br/><br/><label>Subjects--Index Terms: </label>624L:528.4 
<br/><br/><label>Dewey Class. No.: </label>624L:528.4  / AGO