How many children did Harry S. Truman have?

Truman was a doting and protective father to his daughter Mary Margaret. When Truman moved to Washington to serve in the Senate, Margaret was ten-years old. Thereafter, she would live half the year in Independence and half in Washington, until she was in high school. During the White House years, Margaret attended George Washington University. After graduating, she pursued a career as a vocalist. source of info http://www.millercenter.virginia.edu/index.php/Ampres/essays/truman/biography/7 In other words Harry S. Truman only had one child; Margaret.