Columbia subject headings:
Markert, Johann Georg, 1813-1891.
Organ (Musical instrument)--Construction--Germany--Thuringia.
Organ (Musical instrument)--Germany--Thuringia.
Harvard subject headings:
Markert, Johann Georg, 1813-1891.
Organ (Musical instrument)--Germany--Thuringia.
Organ builders--Germany--Ostheim vor der Rhön--Biography.
Princeton subject headings:
Markert, Johann Georg, 1813-1891.
Organ (Musical instrument)--Germany--Thuringia.
Organ builders--Germany--Ostheim vor der Rhön--Biography.