Text ( visual ) : unmediated The economics of transport / by Michael R. Bonavia ; with an introduction by C.W. Guillebaud. -- Rev. ed. -- Digswell Place : J. Nisbet ; Cambridge : Cambridge University Press , 1954. -- xii, 219 p. : ill. ; 19 cm. -- (Cambridge economic handbooks ; 9). -- Previous ed.: 1947 ; Includes bibliographical references and index. -- (BA19640497) ; https://ci.nii.ac.jp/ncid/BA19640497 Author Heading(s): Bonavia, Michael Robert. -- Classification(s): DC18 : 380.5. -- Subject Heading(s): FREE : Transportation ; FREE : Transportation -- Great Britain