• publisher: Dresden, Buchdruckerei von F. L. Staub
  • creator: Geerkens, August [Ferdinand], 1875- [from old catalog]
  • Keyword: Variation (Biology) [from old catalog] Rye. [from old catalog]
  • years: 1901.
  • pages: 56 p., 2 l.
  • class: QH406
  • download: pdf file