The great central railroad from Philadelphia to St. Louis [microform] / by John A. Roebling, C.E. ; read before the Pittsburgh "Board of Trade."

Unsung : unheralded narratives of American slavery & abolition / The Schomburg Center for Research in Black Culture ; foreword by series editor Kevin Young ; edited with an introduction by Michelle D. Commander

New tracks in North America [microform] : A journal of travel and adventure whilst engaged in the survey for a southern railroad to the Pacific Ocean during 1867-8 / by William A. Bell ... with contributions by General W.J. Palmer, Major A.R. Calhoun, C.C. Parry ... and Captain W.F. Colton