Columbia subject headings:
Harvard subject headings:
Apologetics
Matter, Mani--Diaries.
Matter, Mani--Religion.
Matter, Mani.
Singers--Switzerland--20th century.
Theology
Princeton subject headings:
Apologetics.
Diaries.
Matter, Mani--Diaries.
Matter, Mani--Religion.
Singers--Switzerland--20th century.
Theology.