TY  - BOOK
AU  - Escobal,Pedro Ramon
TI  - Methods of orbit determination
U1  - 629.4113 
PY  - 1965///
CY  - New York
PB  - John Wiley and sons
KW  - Orbit mechanisms
KW  - Artificial satellites
KW  - Orbits
KW  - Astrodynamics
KW  - Space trajectories
N1  - Includes bibliographical reference and index
ER  -