TY  - BOOK
AU  - Thewlis, J., ed.
TI  - Problems of extra-galactic research
T2  - IAU Symposium; no. 15
PY  - 1962///
CY  - New York
PB  - Macmillan
KW  - Astronomy and Astrophysics Thesaurus
KW  - Extragalactic objects
KW  - Extragalactic radio sources
ER  -