Gladys West, as a country child in Virginia, would walk after a long walk to a one-room, segregated schoolhouse, and give ...

16.7 x 17.9 cm. (6.6 x 7 in.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...

Without the mathematical model that she helped refine, “the extraordinary positioning, navigation, and timing accuracy of GPS would be impossible to achieve.” ...