000 00305nam a2200133Ia 4500
008 160316s1950 xxu||||| |||| 00| 0 eng d
020 _a
100 _aDonald Alexander Johansen
245 _aPlant Embryology
250 _a1st
260 _aU. S. A.
_bWALTHAM, MASS
_c1950
300 _a305
700 _a
_a
999 _c36045
_d36045