Theoretico-practical Harmonium=School :
Bungart, Heinrich
Theoretico-practical Harmonium=School : from the first rudiments of playing to advanced technic (also adapted for self=tuition) / Theoretico-practical Harmonium=School Heinrich Bungart. - Cologne : P.J. Tonger, 1904. - XXXII, 207 s. : nuty ; 12 cm. - Tonger's Pocket - Album ; 29 .
Tekst ang.-niem.
Theoretico-practical Harmonium=School : from the first rudiments of playing to advanced technic (also adapted for self=tuition) / Theoretico-practical Harmonium=School Heinrich Bungart. - Cologne : P.J. Tonger, 1904. - XXXII, 207 s. : nuty ; 12 cm. - Tonger's Pocket - Album ; 29 .
Tekst ang.-niem.