000 00319 a2200133 4500
082 _a520
_bBIR
090 _c2458
_d2965
100 _aBirney, D. Scott
245 _aModern Astronamy
260 _aBoston
_bAllyn and Bacon
_c1969
_g1969
300 _ax, 338p.
_c24cm.
650 _aAstromy and allied sciences
942 _cL
999 _c31526
_d31526