Orth, Donald J. <br/><br/>
National Geographic Names Data Base: Phase II Instructions 

 - Washington, D.C.  U.S. Government Printing Office  1987 
 - pp. 1-133 
<br/><br/><label>Subjects--Topical Terms: </label><br/>BASES DE DATOS<br/>NOMBRES GEOGRAFICOS
<br/><br/><label>Subjects--Geographic Terms: </label><br/>ESTADOS UNIDOS