Luebbers, Henry A Civil engineer & architect, Denver R.M.News.Mar.2,1871 p.1 c.1 Information regarding railroad convention , Denver. R.M.News.Mar.10,1871 p.2 c.1 City surveyor bond approved, Denver. R.M.News.Apr.14,1871 p.1 c.4 Civil engineer and architect, Denver. R.M.News.Dec.22,1870 p.1 c.4