«It's difficult to estimate this number,» said Ralph Buehler, an assistant professor of urban affairs at Virginia Tech and co-author of `` (scientificamerican.com)
Federal Reserve Board Chairwoman Janet Yellen testifies before the Senate Banking, Housing and Urban Affairs Committee on Capitol Hill on July 13, 2017 in Washington, D.C. (fortune.com)
«It's difficult to estimate this number,» said Ralph Buehler, an assistant professor of urban affairs at Virginia Tech and co-author of «City Cycling,» a book published by the Massachusetts Institute of Technology Press on urban cycling and bike - share programs. (scientificamerican.com)