He did his Ph.D. dissertation in 1927 at the Landessternwarte Heidelberg-Königstuhl (Königstuhl Observatory, near Heidelberg) at the University of Heidelberg[1] (http://www.lsw.uni-heidelberg.de/personnel/diss.phtml).
At the time, the observatory at Heidelberg was a center for asteroid discovery by Max Wolf and Karl Reinmuth and others, and during his time there Bohrmann discovered a number of asteroids.
Bohrmann worked at the observatory from 1924 to 1969. The asteroid 1635 Bohrmann is named after him.
External links
List of Dissertations at the Landessternwarte Heidelberg-Königstuhl (http://www.lsw.uni-heidelberg.de/personnel/diss.phtml)
Obituary (http://adsbit.harvard.edu/cgi-bin/nph-iarticle_query?1999MitAG..83....5.) (in German)