U.S. Govt.
a division of the Department of the Interior, created in 1910, that studies the nation's mineral resources and inspects mines.
U.S. Govt.
a division of the Department of the Interior, created in 1910, that studies the nation's mineral resources and inspects mines.
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012