Edwin A. Pratt,
A History of Inland Transport and Communication in England…
(1912)
“ Marshall, A.: "Principles of Economics" (4th ed., 1898) .Mathew, Francis: "Of the Opening of Rivers for Navigation: The Benefit exemplified by the two Avons of Salisbury and Bristol, with a Mediterranean Passage by Water for Billanders of Thirty Tun, between Bristol and London" (1655) ; "A Mediterranean Passage by Water from London to Bristol and from Lynne to Yarmouth, and so consequently to the City of York, for the great Advancement of Trade and Traffique" (1670) . ”
