The select bibliography of American government given in Hart's Actual Government (American Citizen Series, 1903, 3d ed., 1908), includes the principal authorities which can be usefully consulted with reference to constitutional law and many monographs and articles on special topics of the subject. In the same author's Handbook of American History, Diplomacy and Government (1908), there are also extensive lists of references to treatises, articles and cases relating to different constitutional topics. At the end of Fiske's Critical Period of American History there is an extended bibliographical note. Many references are collected at the end of Vol. II of the final edition of Curtis' Constitutional History of the United States, where is to be found a bibliography of the Constitution prepared in 1896 by Paul Leicester Ford.