%0 Journal Article %T Evaluation of the Impact of Motorcycles in Urban Transport on Air Pollution: A Case of Douala City in Cameroon %J Journal Information: ISSN: Frequency: Journal DOI: Peer-review model: NAAS Score (2017): Digital Archiving: %D 2018 %R 10.9734/JSRR/2018/43224 %X Reviewers: %U http://www.sciencedomain.org/abstract/26033