00621nam a2200205Ia 4500 IN-BaIIA 211028s9999 xx 000 0 eng d IIA Library 520.8 TRA Trackers of the skies edited by Hayes E. Nelson Cambridge Howard A Doyle Publishing 1968 xiii, 169p. Astronomical techniques 1786 Astronomy and astrophysics thesaurus Observing techniques 822 Satellite borne instruments 5837 Sky surveys 1313 Hayes, E. Nelson ed. 5838 BK 3281 3281 0 0 0 0 BAN BAN GEN 1969-09-17 24.75 0 520.8/ TRA 3644 2021-11-05 24.75 1969-09-17 BK Rs. 24.75