Study of coverage overlap among fourteen major science and technology abstracting and indexing services 
/ National Federation of Abstracting and Indexing Services (NFAIS) 
 - Pennsylvania:   National Federation of Abstracting and Indexing Services (NFAIS),   1977 
 - 75p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library science
<br/><br/><label>Subjects--Index Terms: </label>Abstracting and indexing services 
<br/><br/><label>Universal Decimal Class. No.: </label>D 03(026):05:5/6   / L7