000 00295nam a2200121Ia 4500
001 23751
008 170722s9999 xx 000 0 und d
100 _aWang, Jy
245 _aExploringman's environment /
260 _bCummings publishing co. ,
_c1973.
300 _a376 p.
_c23cms
942 _cGEN
999 _c89933
_d89933