Lock, R. Northwood <br/><br/>
James Duff Brown's manual of library economy 
by R. Northwood Lock 
 - 7th ed. 
 - London  Grafton  1961 
 - 307p. 
<br/><br/> 63/- 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library Science
<br/><br/><label>Dewey Class. No.: </label>P9 B813/L789