[Ecuador].
Instituto Geográfico Militar (Ecuador)
Pan American Institute of Geography and History.
Quito, Ecuador : Instituto Geográfico Militar ; [Mexico City] : Instituto Panamericano de Geográfia e Historia,
1984-
Spanish, English, Portuguese, and French.
Includes compilation diagram, location diagram, and glossary.
"Compilado y trabajado en el Instituto Geogr ́afico Militar."
Relief shown by contours and spot heights.
Graphic index in central file.