R. Squires

Downward-deployed tethered platforms for high enthalpy aerothermodynamic research

G. Carlomagno, P. Siemers, G. Wood, 1988 .

Vanguard Measurements Give Pear-Shaped Component of Earth's Figure.

J. O'keefe, J A O'keefe, A Eckeis, 1959, Science.

The gravitational field of the earth

J. O'keefe, John A. O'Keefe, Ann Eckels, 1959 .