NPL, 1968. 

 - New Delhi  [1968] 
 - 56 p.  illus., facsims., map.  27 cm. 
<br/><br/> Cover title. 
<br/><br/><label>LCCN: </label>sa 68019129 //r862 
<br/><br/><label>Subjects--Corporate Names: </label><br/>National Physical Laboratory (India)
<br/><br/><label>LC Class. No.: </label>QC51.I42  / N376 
<br/><br/><label>Dewey Class. No.: </label>530/.07/205456