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Durk Houtsma - Archive: NMBS 341 (L 2862)
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Durk Houtsma - Archive: NMBS 314 (IR 2912)
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Durk Houtsma - Archive: NMBS 423 (IR 4930)
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Durk Houtsma - Archive: NMBS 360 + 381 (IR 2911)
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Durk Houtsma - Archive: NMBS 348 + 316 (IR 2910)