Levelling instruction book : Part 1 - field work 

 - Kathmandu  Nepal. Survery department geodetic survey branch  1988 
 - p. 116 ill  Includes index 
<br/><br/><label>Subjects--Index Terms: </label>Statistics;Study guides;Surveys 
<br/><br/><label>Dewey Class. No.: </label>001.4