Walford's guide to reference material / 
Edited by A.J. Walford ; with the asistance of Anthont P. Harvey and H. Drubba. 
 - 4th ed. 
 - London :  Library Association,  1980. 
 - v. "1." (697 p.) 
<br/><br/>v.1 : Science & technology - v.2 : Social & Historical sciences, Philisophy & religion. 
<br/><br/><label>ISBN: </label>3598101317 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bilim ve Teknoloji<br/>Science and technology
<br/><br/><label>Dewey Class. No.: </label>509.17  / WAL 1980