LEADER 00498nam 2200181 u 450 001 996320725903316 005 20190405143003.0 035 $a(EXLCZ)9912021678000041 100 $a20190405d1972 uy 0 101 0 $aeng 200 10$aSteps to an ecology of mind 210 $aNew York$cBallantine Books$d1972 311 $a345-24684-5-225 676 $a301 700 $aBateson$b Gregory$f1904-1980$011297 912 $a996320725903316 996 $aSteps to an ecology of mind$923209 997 $aUNISA