000 00312nam a2200133 a 4500
001 007919
008 991230sESP 000 u spa u
082 0 _a333.95
_bB195
245 0 0 _aLa biosfera
260 _aMadrid, Esp. :
_bAlianza Editorial,
_c1972.
300 _a267 p.
650 4 _aBiosfera.
_9524
942 _cBK
999 _c5049
_d5049