TY  - BOOK
AU  - Gray Richard O
AU  - Corbally Christopher J
TI  - Stellar spectral classification
SN  - 978-0-691-12511-4
U1  - 523.87 
PY  - 2009///
CY  - Princeton
PB  - PUP
KW  - Stars
KW  - Stars-spectra
ER  -