Allen, Frank C.
Railroad curves and earthwork / by C.Frank Allen - 7th ed. - London : McGraw-Hill, 1931. - xiii, 290 p. : ill.
44041066
Earthwork.
Railroad engineering.
Railroad curves and earthwork / by C.Frank Allen - 7th ed. - London : McGraw-Hill, 1931. - xiii, 290 p. : ill.
44041066
Earthwork.
Railroad engineering.