1. -Location and Congreacion of Tuxtepec, Oaxaca, Mexico.
2. -Drainage basin of Mexico.
3. It is mainly an important Mexico River, which empties into the Gulf of Mexico, passing through the towns of Tuxtepec, Alvarado, Tlacotalpan and Cosamaloapan.
4. -Papaloapan is a toponym nahuatl to signicica place of butterflies
