" and section 90 pertaining to "the annual gains, profits, or income of every person residing in the United States, whether derived from any kind of property, rents, interest, dividends, salaries, or from any profession, trade, employment or vocation carried on in the United States or elsewhere, or from any other source whatever
مفهوم ضريبة الدخل
2 Breasted, Ancient Records, Volume 2, paragraph 719-742•