@book{SchmidtKlausmeier, author = {Schmidt, Leo and Klausmeier, Axel}, title = {Mauerreste - Mauerspuren : der umfassende F{\"u}hrer zur Berliner Mauer}, publisher = {Bad M{\"u}nstereifel : Westkreuzverl.}, isbn = {3-929-59250-9}, language = {de} } @book{SchmidtKlausmeier, author = {Schmidt, Leo and Klausmeier, Axel}, title = {Wall Remnants - Wall Traces : the comprehensive guide to the Berlin Wall}, publisher = {Westkreuzverl.}, address = {Bad M{\"u}nstereifel}, isbn = {3-929592-40-1}, language = {en} }