In Pursuit of Profit: The Annapolis Merchants in the Era of the American Revolution. (Baltimore: The Johns Hopkins University Press, 1975).

Maryland: A New Guide to the Old Line State. (Baltimore: The Johns Hopkins University Press, 1976). With Gregory A. Stiverson, Susan A. Collins, Lois Green Carr.

Law, Society & Politics. The Proceedings of the First Conference on Maryland History. (Baltimore: Johns Hopkins University Press, 1977). With Aubrey C. Land and Lois Green Carr.

An Inventory of Maryland State Papers, Part I, The Revolutionary War Era, 1775-1789. (Annapolis: Maryland Hall of Records, 1977). With Gregory A. Stiverson and Mary D. Donaldson.

A Biographical Dictionary of the Maryland Legislature, 1635-1789. (Baltimore: The Johns Hopkins University Press, 1979, 1985). With David Jordan, Alan Day, Gregory A. Stiverson.

A Guide to the Maryland Hall of Records: Local, Judicial, and Administrative Records on Microform. (Annapolis: Maryland Hall of Records, 1978). With Susan A. Collins and Christopher Allan.

The Hammond-Harwood House Atlas of Historical Maps of Maryland, 1608-1908. (Baltimore: The Johns Hopkins University Press, 1982). With Joseph M. Coale III.

Magna Charta For America. (Philadelphia; The American Philosophical Society, 1986). With Jack P. Greene and Charles F. Mullett.

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