Columbia subject headings:
Technology and state--Southern States--Congresses.
Technology--Social aspects--Southern States--Congresses.
Technology--Study and teaching (Higher)--Southern States--Congresses.
Harvard subject headings:
Engineering--Southern States--History--Congresses.
Technology--Social aspects--Congresses
Technology--Southern States--History--Congresses.
Technology--Study and teaching--Southern States--Congresses.
Princeton subject headings: