Annual reports for the fiscal year ended june 30 :  1912. 

 - Washington :  Post Office Department,  1913. 
 - 363 p. ;   23 cm. 
<br/><br/> Incluye indice de la p.354-366. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Servicios postales.<br/>Correos.<br/>Anuario.<br/>Informes.