Columbia subject headings:
Diderot, Denis, 1713-1784--Congresses.
Form (Philosophy)--Congresses.
Harvard subject headings:
Diderot, Denis, 1713-1784--Congresses.
Form (Philosophy)--Congresses.
Princeton subject headings:
Diderot, Denis, 1713-1784--Congresses.
Form (Philosophy)--Congresses.