Triangulation and its computation  Surveyer General of Pakistan 

 - 4th ed. 
 - Murree:  Survey of Pakistan office,   1966. 
 - xix, 116p. : 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>MCE
<br/><br/><label>Dewey Class. No.: </label>526.33  / SUR