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1Published 1988Subjects: “...Railroads United States Employees Alcohol use....”
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2Published 1985Subjects: “...Railroads United States Crossings Accidents....”
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3Published 1987Subjects: “...Railroads United States Crossings Accidents....”
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4Published 1987Subjects: “...Railroads United States Accidents....”
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5Published 1981Subjects: “...Railroads United States Crossings Safety measures....”
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7Published 1981Subjects: “...Railroads United States Accidents....”
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8Published 2001Subjects: “...Railroads United States Trains Safety measures....”
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9Published 2001Subjects: “...Railroads United States Trains Safety measures....”
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10Published 2002Subjects: “...Railroads United States Trains Safety measures....”
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11Published 2001Subjects: “...Railroads United States Trains Safety measures....”
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12Published 1992Subjects: “...Railroads United States Cars Inspection....”
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13Published 2001Subjects: “...Railroads United States Trains Safety measures....”
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14Published 2002Subjects: “...Railroads United States Trains Safety measures....”
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15Published 1979Subjects: “...Railroads United States Track Inspection....”
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16Published 2002Subjects: “...Railroads United States Trains Safety measures....”
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17Published 1991Subjects: “...Street-railroads United States Accidents....”
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18Published 2002Subjects: “...Railroads United States Trains Safety measures....”
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19Published 1993Subjects: “...Railroads United States Accidents....”
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20Published 2004Subjects: “...Railroads United States Safety measures....”
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