TY  - GEN
AU  - Walker, richard 
TI  - Spectral atlas for amateur astronomers: a guide to the spectra of astronomical objects and terrestrial light sources 
SN  - 978-1-107-16590-8
PY  - 2017///
CY  - Cambridge
PB  - Cambridge university press
KW  - Star- atlases
KW  - Stars-spectra-atlases
KW  - Astronomy- charts
ER  -