Search for: [References = %2233. Thompson G.L.%2C Brown J.R.%2C 2006%2C Explaining variation in transit ridership in U.S. metropolitan areas between 1990 and 2000%2C Transportation Research Record%5C: Journal of the Transportation Research Board %5C(1986%5C)%2C s. 172%E2%80%93181.%22]

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