000 00279nam a2200109Ia 4500
008 140113s9999 xx 000 0 und d
100 _a"Frefwell, Stephen. D."
245 _aPopulations in a seasonal environment
260 _a1972
_bPUP
_cNew Jersey
300 _a217
942 _cBK
999 _c60612
_d60612