\piece{Dreistimmige messe in G}{Robert Führer}

Av Robert Führer.

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\LYIND\input{op295_6A-systems.tex}
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\LYIND\input{op295_6B-systems.tex}
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\LYIND\input{op295_6C-systems.tex}
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\LYIND\input{op295_6D-systems.tex}
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\LYIND\input{op295_6E-systems.tex}
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\LYIND\input{op295_6F-systems.tex}