"It is probable that the upper Irrawaddy originally flowed south from Mandalay, discharging its water through the present Sittang River to the Gulf of Martaban, and that its present westward course is geologically recent" - Encyclopedia Britannica Online hoofdstuk Physical features » Physiography, alinea 3 geraadpleegd d.d. 5/12. Gearchiveerd op 28 april 2015.
"It is probable that the upper Irrawaddy originally flowed south from Mandalay, discharging its water through the present Sittang River to the Gulf of Martaban, and that its present westward course is geologically recent" - Encyclopedia Britannica Online hoofdstuk Physical features » Physiography, alinea 3 geraadpleegd d.d. 5/12. Gearchiveerd op 28 april 2015.
