Report on the continuance of protection to the zip 

 - Delhi  Manager of Publication India         1955 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mechanical
<br/><br/><label>Dewey Class. No.: </label>X 9(D6,8zF):531.2.N54t, J5