Bacon, Roger,  1214?-1294. <br/><br/>
Opus majus of Roger Bacon / 
by Roger Bacon. 
 - New York, :  Russell & Russell,  c1962. 
 - xiii, 418 p. :  illus., ports. ;  23 cm. 
 -  1 .
<br/><br/><label>LCCN: </label>62010702  
<br/><br/><label>LC Class. No.: </label>B765.B23  / O23 1962 
<br/><br/><label>Dewey Class. No.: </label>189 Bac 1962 v.1