Columbia subject headings:
Haebler, Konrad, 1857-1946--Bibliography.
Incunabula.
Manuscripts.
Printing--History--Origin and antecedents.
Harvard subject headings:
Haebler, Konrad, 1857-1946--Bibliography.
Printing--History--Origin and antecedents
Princeton subject headings:
Haebler, Konrad, 1857-1946--Bibliography.
Printing--History--Origin and antecedents.