Work-related letters (correspondent files),
Work-related letters (correspondent files),
Research notes and source materials,
Research notes and source materials,
Newspaper and magazine articles,
Newspaper and magazine articles,
Work-related letters (subject files),
Work-related letters (subject files),
'Canis' publications',
'Canis' publications',
Erich Schneider-Leyer,
Erich Schneider-Leyer,
