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Sivak, Michael; Flannagan, Michael J.; Ensing, M.; Simmons, Carole J. (University of Michigan, Ann Arbor, Transportation Research Institute, 1989-10)
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Flannagan, Michael J.; Sivak, Michael; Ensing, M.; Simmons, Carole J. (University of Michigan, Ann Arbor, Transportation Research Institute, 1989-11)