Comparison of the male and female body, front side and back views, by Hermann Heller.
This is from a 2001 republication by the Folio Verlag, Vienna, of a nineteenth century book of anatomical drawings by Hermann Heller.
Modelle der Künstler-Anatomie at Amazon.de. (Germany)
A copy is for sale on Ebay. Click here to see the book for sale on Ebay.