Earth dymanic crust 

 - Washington :   National Geographic Society,  1985 
 - A color 
<br/><br/> With : the shaping of a continent north America's Active West 
<br/><br/>Ciencias sociales 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MAPAMUNDIS<br/>AMERICA DEL NORTE --MAPAS