Ong pa ton ga, chief of the Omahas. McKenney, Thomas Loraine, 1785-1859 & Hall, James, 1793-1868. History of the Indian Tribes of North America, with Biographical Sketches and Anecdotes of the Principal Chief. Embellished with One Hundred and Twenty Portraits, from the Indian Gallery in the Department of War, at Washington. Philadelphia: F.W. Greenough, 1838-1844.