53177. Railroad curves and earthwork / by C. Frank Allen. - 7th rev. ed. - New York [etc.] : McGraw-Hill Book Company, 1931. 235, [15] p. : ill. : 17 cm. - . - 1e druk 1889 PK : NS O 87

53177. Railroad curves and earthwork / by C. Frank Allen. - 7th rev. ed. - New York [etc.] : McGraw-Hill Book Company, 1931. 235, [15] p. : ill. : 17 cm. - . - 1e druk 1889 PK : NS O 87