TY  - GEN
AU  - Wilson,Edmund B.
TI  - Differences in the chromosome -groups of closely related species and varieties, and their possible bearing on the "physiological species."
PY  - 1909///
CY  - Cambridge, Mass. : 
PB  - [s.n.], 
N1  - Tav. di studio SZN ;; Reprint: Advance print from the proceedings of the Seventh International Zoological Congress, Boston Meeting, August 19-24, 1907
ER  -