000 00477nad a22001577a 4500
008 120525s1929 -us||||| |||| 00| 0 eng d
041 _aeng
100 1 _aSumner, Francis B.
245 1 _aIs evolution a continuous or discontinuous process? /
_cby Francis B. Sumner
260 _a[S.l. :
_bs.n.],
_c1929
300 _a72-78 p. ;
_c26 cm
440 1 _aThe scientific monthly ;
_v29
500 _aTav.di studio SZN
760 _03563
_93563
_tBiol. Gen.
_w3563
942 _2ddc
_cPM
999 _c33704
_d33704