Book needed: Ranke 1931

["Richard F. Lyon" <dicklyon@xxxxxxx>]

This seems to be where the 2D cochlear wave model first came up,

but I can't locate a copy with 2000 miles, though WorldCat shows a
few around, includes 2 in North America:
http://www.worldcat.org/title/gleichrichter-resonanztheorie-eine-erweiterung-der-helmholtzschen-resonanztheorie-des-gehors-durch-physikalische-untersuchung-der-flussigkeitsschwingungen-in-der-cochlea/oclc/14726186

Anyone at Princeton or McGill or elsewhere up for checking one out for me?

@book{ranke1931,
  title={Die Gleichrichter-Resonanztheorie (The Rectifier Resonance Theory)},
  author={Ranke, Otto Friedrich},
  year={1931},
  publisher={Lehmann}
}