Click to increase image sizeClick to decrease image size Additional informationNotes on contributorsMartha Baer WilmesMartha Baer Wilmes, Assistant Director of the National Clearinghouse for Commuter Programs and Assistant Director of the Office of Commuter Affairs, The University of Maryland, College Park, MD 20742Stephanie L. QuadeStephanie L.
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Wilmes et al. (1986) studied this question.
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