53418. Fifty years of railway signalling / by O.S. Nock. - London : Institution of Railway Signal Engineers, 1962. 222 p. : ill. : 23 cm. - . - Met reg. en bibliogr. - Uitg. ter gelegenheid van het 50-jarig bestaan van de Institution of Railway Signal Engineers 1912-1962 PK : NS K 509
53418. Fifty years of railway signalling / by O.S. Nock. - London : Institution of Railway Signal Engineers, 1962. 222 p. : ill. : 23 cm. - . - Met reg. en bibliogr. - Uitg. ter gelegenheid van het 50-jarig bestaan van de Institution of Railway Signal Engineers 1912-1962 PK : NS K 509
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53418. Fifty years of railway ...... ers 1912-1962 PK : NS K 509
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