000 00340nam a2200121Ia 4500
008 140113s9999 xx 000 0 und d
082 _a577.14:312 L2
100 _a"Enrich, Paul. R. & Enrich, Anne H."
245 _a"Population, Rsources, Environment"
260 _a1972
_bW.H.Freeman & Co.
_cSan Franscisco
300 _a509
942 _cBK
999 _c58257
_d58257