TY  - BOOK
AU  - Hynek, J. Allen, ed. 
TI  - Astrophysics : a topical symposium commemorating the fiftieth anniversary of the Yerkes Observatory and a half century of progress in astrophysics
T2  - McGraw-Hill Astronomical Series
SN  - 1258240521
PY  - 1951///
CY  - New York
PB  - McGraw Hill
KW  - Astrophysics
ER  -