@article{pittir18898,
          volume = {88},
          number = {8},
           month = {December},
          author = {Chongyi Wei and Willi McFarland and Grant N Colfax and Vincent Fuqua and H Fisher Raymond},
           title = {Reaching black men who have sex with men: a comparison between respondent-driven sampling and time-location sampling},
         journal = {Sexually Transmitted Infections},
           pages = {622 -- 626},
            year = {2012},
             url = {http://d-scholarship-dev.library.pitt.edu/18898/}
}