National directory of newsletters and reporting services 
/ Gale Research Company 
 - 2nd ed. 
 - Michigan:   Gale Research Company,   1978 
 - 442p. 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Information science
<br/><br/><label>Subjects--Index Terms: </label>National directory 
<br/><br/><label>Universal Decimal Class. No.: </label>D 002(100)(058.7)  / L8.3