TY  - BOOK
AU  - Blackshear, W. Thomas
AU  - Johnson, Kaherine G. 
TI  - A study of solar-system geometric parameters for use as interplanetary navigation aids [NASA TN D-2890]
U1  - NASA 
PY  - 1965///
CY  - Washington, D. C. 
PB  - NASA
KW  - Geometric
ER  -