The Nazi's comprehensive graphic standards manual (observatory.designobserver.com)

Here's a link to a PDF of the book itself, if you want to try your hand at reading German printed in tightly-spaced Fraktur:

http://ia700306.us.archive.org/16/items/OrganisationsbuchNSDAP/Organisationsbuch_der_NSDAP_3._Auflage_1937_678_S._Scan_Fraktur.pdf