Columbia subject headings:
Technological innovations--Europe--History--18th century--Congresses.
Technological innovations--Germany--History--18th century--Congresses.
Technology transfer--Europe--History--18th century--Congresses.
Technology transfer--Germany--History--18th century--Congresses.
Harvard subject headings:
Technological innovations--Europe--History--18th century--Congresses.
Technological innovations--Germany--History--18th century--Congresses.
Technology transfer--Europe--History--18th century--Congresses.
Technology transfer--Germany--History--18th century--Congresses.
Princeton subject headings:
Technology--History--18th century.