He ended this practice because of the difficulty of distinguishing between ethnographic works and original arrangements and between main and side works . He ended this practice because of the difficulty of distinguishing between ethnographic works and original arrangements , and between major and minor works .
Beliau menamatkan amalan ini kerana kesukaran membezakan antara karya etnografi dan susunan asal dan antara karya utama dan sampingan. Beliau menamatkan amalan ini kerana kesukaran membezakan antara karya etnografi dan susunan asal, dan antara karya utama dan kecil.