Links don't work for me, but you can get to a source for the three books at:

http://imslp.org/wiki/K%C3%B6hler's_Violin_Repository_of_Dance_Music_(K%C3%B6hler,_Ernest)

Clicking on links at this page for each of the three volumes will take you to a "disclaimer page" where you must click on an agreement that the site does not represent that the book is copyright free.
After the last click (on each of the three disclaimer pages) the pdf should load.

Vol 1 is about 100pp, 16 MB.

John