00389nam a2200145Ia 4500008004100000082001900041100001600060245004700076260004500123300000800168650002300176650001800199653001500217653001100232170901s1957    xx            000 0 und d  a582.0463bE77P  aErdtman, G. 0aPollen and Spore Morphology/Plant Taxonomy  aNew YorkbThe Ronald Press Companyc1957  a151  aBotanical sciences  aPure Sciences  aMorphology  aPollen