000 00361nam a2200133Ia 4500
008 231129s1975||||xx |||||||||||||| ||spa||
020 _a84-250-0191-9
082 _aHAJ- 0245
100 _aHeilbroner Robert L.
245 0 _aEl porvenir humano
260 _c1975
264 _aMadrid: Guadarrama 1975
942 _2ddc
_cBKS
999 _c12148
_d12148