- Ph.D., Kent State University, 1972
- M.A., Kent State University, 1969
- B.A., Denison University, 1967
- The Imaginary Line: A History of the United States and Mexican Boundary Survey, 1848-1857(Fort Worth: Texas Christian University, 2008)
- “Redrawing the Southwestern Boundary, 1891-1896,”Southwestern Historical Quarterly, CIV (July, 2000), pp. 1-20.
- “Pedro García Conde and the Gadsden Treaty,”La ciudad y el campo en la historia de México(Mexico City: Universidad Nacional Autónoma de México, 1993), II, 699-707.
- “Surveying the Rio Grande, 1950-1853,”Southwestern Historical Quarterly, XCIV (April, 1992), pp. 535-54.
- “Mexico’s Interpretation of the Guadalupe Hidalgo Line,” University Microfilms, 1987.
- “Major Emory and Captain Jiménez: Running the Gadsden Line,”Journal of the Southwest, XXIX (Summer, 1987), pp. 203-221.
- “Partisan Politics and the Mexican Boundary Survey, 1848-1853,”Southwestern Historical Quarterly, XC (April, 1987), pp. 329-346.
- “Pedro García Conde: el trazado de Limites con Estados Unidos desde el punto de vista mexicano (1848-1853),”Historia Mexicana, XXXVI (julio-septiembre, 1986), pp. 113-129.
- “Esteban Cantú y la sobernía mexicana en Baja California,”Historia Mexicana, XXX (julio-septiembre, 1980), pp. 1-32.
- “Boundary Markers or a Wall of Shame,” paper read at the XII Reunion de Historidores Mexicanos, Estadounidenses y Canadiense, Vancouver, British Columbia, Canada, 2006.
- “Vice Revenue and the Growth of Government in Baja California Norte, 1910-1920,” paper read at the XI Reunion de Historiadores Mexicanos, Estadounidenses y Canadienses, Monterrey, Nuevo Leon, Mexico, 1-4 October 2003.
- “Baja California in the Mexican Revolution,” paper read at the Midwest Association for Latin American Studies, Veracruz, Mexico, 2000.
- “Mexico’s Interpretation of the Guadalupe Hidalgo Line,” paper read at the American Historical Association, Washington, D.C., 1987.
- “Surveying the Upper Rio Grande, 1850-1853,” paper read at the Texas State Historical Association, Galveston, Texas, 1987.
- “Felix Diaz and the Counterrevolution in Baja California,” paper read at the Southeastern Council on Latin American Studies, MJrida, Mexico, 1987.
- “Major Emory and Captain JimJnez: Surveying the Gadsden Line,” paper read at the Pacific Coast Branch of the American Historical Association, Honolulu, Hawaii, 1986.
- “Pedro GarcRa Conde and the Mexican View of the Boundary Survey,” paper read at the VII Conference of Mexican and United States Historians, Oaxaca, Mexico, 1985.
- “Partisan Politics and the Mexican Boundary Survey, 1848-1854,” paper read at the Western Historical Association, Sacramento, California, 1985.
- “The United States and Mexican Boundary Survey Papers in the National Archives, 1848-1858,” paper read at the Latin American Studies Association, Mexico City, 1983.
- “Influence of Mexico’s Revolution on Baja California Norte,” paper read at the Pacific Coast Council on Latin American Studies, San Diego, California, 1982.
- “The United States and Mexico in Baja California During the Revolution of 1910,” paper read at the Mid-American Conference on History, Springfield, Missouri, 1979.
- “Esteban Cantd and Mexican Sovereignty in Baja California,” paper read at the Missouri Conference on History, Kansas City, Missouri, 1976.