Columbia subject headings:
Gast, Peter, 1854-1918.
Nietzsche, Friedrich Wilhelm, 1844-1900--Friends and associates.
Nietzsche, Friedrich Wilhelm, 1844-1900.
Overbeck, Franz, 1837-1905--Correspondence.
Philosophers--Germany--Biography.
Theologians--Correspondence.
Harvard subject headings:
Gast, Peter, 1854-1918--Correspondence.
Nietzsche, Friedrich Wilhelm, 1844-1900--Sources.
Overbeck, Franz, 1837-1905--Correspondence.
Princeton subject headings:
Gast, Peter, 1854-1918.
Nietzsche, Friedrich Wilhelm, 1844-1900--Friends and associates--Correspondence.
Nietzsche, Friedrich Wilhelm, 1844-1900.
Overbeck, Franz, 1837-1905--Correspondence.
Philosophers--Germany--Biography.
Theologians--Correspondence.