Title: A treatise on roads : wherein the principles on which roads should be made are explained and illustrated, by the plans, specifications, and contracts made use of by Thomas Telford, Esq. on the Holyhead road /
Authors: Parnell, Henry, 1776-1842.; Telford, Thomas, 1757-1834
Publisher: Printed for Longman, Rees, Orme, Brown, Green & Longman,
Year: 1833