TY  - BOOK
AU  - Hayes,Eugene Nelson
TI  - Trackers of the skies,
AV  - TL796.6.E2 H3 1968
U1  - 629.43/7 
PY  - 1968///]
CY  - Cambridge, Mass.
PB  - H. A. Doyle Pub. Co.
KW  - Smithsonian Institution
KW  - Astrophysical Observatory
KW  - Artificial satellites
KW  - Tracking
N1  - Bibliography: p. 166-169
ER  -