All I could find is this - you probably know about it - but to make sure ...
DESCENDANTS OF JOHANN(ES) “HANS” BUHRER
Posted to Ancestry.com by Barbara McCarthy
manuscript OF JOHANN(ES) “HANS” BUHRER
Joseph Gable Beerer 1884-1944
There are 213 pages, online.http://www.henrygrowfamily.org/showmedia.php?mediaID=4994
How about this website? https://archive.org/stream/ancestryhistoryo00buhr/ancestryhi...
The text is somewhat written in a weird form, maybe this is due to translation from German into English, but it looks interesting.
I didn’t read the whole text; it is written by JAMES D. BUHRER.
And I believe the ALLEN COUNTY PUBLIC LIBRARY (OHIO?) might be able to help you in your research.
P.S. Haven't figured out who wrote the manuscript!