000 002750000a22001210004500
245 _aIntroduction to space
100 _aDuCridge, L.A.
260 _aNew York
_bColumbia University Press
_c1960
300 _a80 p.
080 _a629.78
_bD8
041 _aEN
942 _cBK
999 _c53410
_d53410