R032
Enc
E3
Encyclopaedia Britanica; a new surrey of universal knowledge .Walter Yust , editor. Chicago ,Encyclopaedia Britanica,1949 
24 t. ilus. , retratos , mapas. 29 cm. 
" Published with the editorial advice and consultation of the faculties of the University of Chicago ". 
---- ------Suplemento : 1947, 1949 - 1960.