The Origins of Professional Soccer in the USA: The Story of the 1967 United Soccer Association
USA-Soccer – United Soccer Association
Impact United Soccer Club Utah's Best Youth Soccer Programs
USWNT and U.S. Soccer Federation reach $24 million settlement in equal pay lawsuit
United Soccer Association - Wikipedia
Chevrolet Signs with United States Soccer Federation
U.S. Soccer says it has offered men, women identical contracts – The Denver Post
Who is US Youth Soccer? New York State West Youth Soccer Association
U.S. Soccer Official Website
US Youth Soccer National League - USYS National League