000 00313nam a2200121Ia 4500
008 140113s9999 xx 000 0 und d
082 _a58:576.1 J1
100 _a"Clausen, J."
245 _aStages in the evaluation of plant species
260 _a1951
_bHafner Pub. Co.
_cNew York
300 _a206
942 _cBK
999 _c56882
_d56882