00290nam a2200109Ia 450000500170000000800410001708200150005810000180007324500430009126000380013430000080017220260224040954.0260224s9999||||xx |||||||||||||| ||und||  a580.12 BEN  aBenson, L.D.  0aPlant taxonomy: methods and principles  aNew York, Ronald Press Co. c1962  a294