Gray John <br/><br/>
Scientific information 
Gray John; Perry Brian 
 - London  O U P UK         1975 
 - 62p.  cm. 
 - Science and engineering series .
<br/><br/><label>ISBN: </label>0 19 858317 6 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library Sicence
<br/><br/><label>Dewey Class. No.: </label>2:97, L5