TY  - BOOK
AU  - Berg, M. D.
TI  - Catalogue of photographic, photovisual magnitudes and spectra of stars in two galactic regions
T2  - Publications de l'Observatoire central à Poulkovo
VL  - Sér. 2. Vol. 51
PY  - 1931///
CY  - Ленинград
PB  - Гл. Астрономическая обсерватория в Пулкове
ER  -