000 00522nam a2200205Ia 4500
008 230524s9999 xx 000 0 und d
040 _cUDSM
050 _aQK901.C55
100 _aClausen, Jens Christian
245 0 _aExperimental studies on the nature of species
260 _aWashington, D.C.
260 _bCarnegie Institution of Washington
260 _c1940
300 _a129p.
300 _c26cm.
650 _aBotany
700 _aill.
942 _2Library of Congress Classification
942 _cBook
999 _c29626
_d29626