National Guard U.S.
U.S. News & World Report
Virgin Islands of the U.S.
U.S. National Institute of Standards and Technology NIST
U.S
Meaning of U.S in English
Britannica Concise Encyclopedia. Краткая энциклопедия Британика. 2012
National Guard U.S.
U.S. News & World Report
Virgin Islands of the U.S.
U.S. National Institute of Standards and Technology NIST
Britannica Concise Encyclopedia. Краткая энциклопедия Британика. 2012