The new encyclopaedia Britannica :   :  macropaedia, knowledge in depth, Proboscidea - Rubber 

 - 15th ed. 
 - Chicago :   Encyclopaedia Britannica,   1974. 
 - v.15, 1183 páginas 
<br/><br/><label>ISBN: </label>0852292902 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ENCICLOPEDIAS