Columbia subject headings:
Harvard subject headings:
Businesspeople--Switzerland--Biography.
Construction industry--Switzerland--History.
Enderlin, Johann Peter, 1844-1925.
Entrepreneurship--Switzerland--History.
Fortification--Switzerland--History.
Princeton subject headings:
Businesspeople--Switzerland--Biography.
Construction industry--Switzerland--History.
Enderlin, Johann Peter, 1844-1925.
Entrepreneurship--Switzerland--History.
Fortification--Switzerland--History.