File:Isselhardt-Ralph-1936.jpg

Summary
Detroit Lions tackle Ralph "Izzy" Isselhardt, 1936

Photographer uncredited.

Published in Harold "Speed" Johnson (ed.), Who's Who in Major League Football 1936. Chicago: B.E. Callahan, 1936; p. 13.

Copyrighted for a term of 25 years, copyright not renewed, public domain.

Evidence of non-renewal of copyright from Stanford Copyright Renewal Database: https://exhibits.stanford.edu/copyrightrenewals/catalog?exhibit_id=copyrightrenewals&search_field=search_title&q=Who%27s+Who+in+Major+League+Football

Scanned and digitally edited by Tim Davenport ("Carrite") from a specimen in his collection, no copyright claimed for the work, digital file released to the public domain without restriction.