"0"^^ . "00817191-n"^^ . "0"^^ . "100817191"^^ . . . "a method of controlling the flight of a missile by devices that respond to the strength and direction of the earth's gravitational field"@en-us . . . "100766967"@en-us . . . . . "terrestrial guidance"^^ . . "100522388"@en-us . "terrestrial guidance"@en-us .