Columbia subject headings:
Harvard subject headings:
Highway engineers--Great Britain.
McAdam family.
McAdam, John Loudon, 1756-1836.
Road construction industry--Great Britain--Biography.
Roads--Great Britain--History--19th century.
Princeton subject headings:
McAdam family.
McAdam, John Loudon, 1756-1836.
Roads, Mcadamized--History.
Toll roads--England--History.