'About 2/3 of the boundary between Mexico & the U.S. is formed by this river'
the Rio Grande
MEXICO: About 2/3 of the boundary between Mexico & the U.S. is formed by this river
About 2/3 of the boundary between Mexico & the U.S. is formed by this river
About 2/3 of the boundary between Mexico & the U.S. is formed by this river
MEXICO
the Rio Grande
MEXICO