TY  - BOOK
AU  - Hayes, E. Nelson ed.
TI  - Trackers of the skies
PY  - 1968///
CY  - Cambridge
PB  - Howard A Doyle Publishing
KW  - Astronomical techniques
KW  - Astronomy and astrophysics thesaurus
KW  - Observing techniques
KW  - Satellite borne instruments
KW  - Sky surveys
ER  -