Bits & Bytes GSD Pedigree Research

I am interested in purchasing:

East German Körbücher (Years prior to 1970)
East German catalogs from shows/trials
Merseburg Zuchtbücher
Belgian-books/catalogs or anything related to GSD's
Czech-books/catalogs or anything related to GSD's

Please include a detailed list, including condition of each and price to
Yvonne Hecht

I am also interested in trading:
Pedigree information with people in other countries.

Graphics Courtesy of GRRRfix