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1Published 1981Subjects: “...Railroads United States Crossings Congresses....”
Government Document Conference Proceeding Book -
2by Dean, Francis E.Subjects: “...Railroads United States Ties, Concrete Testing....”
Published 1982
Government Document Book -
3Published 1982Subjects: “...Railroads United States Track Testing....”
Government Document Book -
4by Dean, Francis E.Subjects: “...Railroads United States Ties Testing....”
Published 1981
Government Document Book -
5
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6
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7Published 1981Subjects: “...Railroads United States Rails Testing....”
Government Document Book -
8Published 1982Subjects: “...Railroads United States Safety appliances Congresses....”
Government Document Conference Proceeding Book