TY  - RPRT
TI  - Further observations of BL Lacertae
AU  - Thuan, T. X.
AU  - Oke, J. B.
AU  - Gunn, J. E.
PY  - 1975
UR  - https://ntrs.nasa.gov/citations/19760029612
ID  - 19760029612
ER  -