http://pec.lib.wvu.edu/record/P130421937History of the Ordinance of 1787 and Old Northwest Territory : a supplemental text for school use.<p> Monograph.</p>Federal Writers' Project.Northwest Territory Celebration Commission (U. S.)United States. Ordinance of 1787.Northwest, Old--History.United States--History--1783-1865.United States. Ordinance of 1787--Bibliography.Northwest, Old--Bibliography.14256