United States. Senate <br/><br/>
Senate Documents, vol 4 Nºs 35, 169, 180. 57 th. Congress. 

 - Washington :   Government Printing Office,   1903. 
 - 312 p. ;   18 cm. 
<br/><br/> Contiene: Conferencia del café, 1902. Convención sanitaria, 1902. Congreso aduanero, 1903