TY  - BOOK
AU  - Gregersen, Erik, ed.
TI  - Astronomical observations: astronomy and the study of deep space
SN  - 978-161530-025-9
PY  - 2010///
CY  - New York
PB  - Britannica
KW  - Astronomical instruments-Popular works
KW  - Astronomy-Observations-Popular works
KW  - Astronomy-Popular works
ER  -