Morley, S. Griswold,  1878-1970 <br/><br/>
Bureau of american ethnology   : an introduction to the study of the maya hieroglyphs /  
Silvanus Griswold Morley. 
 - Washington :   Goverment Printing Office,   1915. 
 - XVI, 284 p., lám. :   il. ;   24 cm.