Education:
B.A., California State University--Long Beach (1962); M.A., University of Texas (1964); PhD., University of Texas (1969)

Awards and Honors:
Order of Rio Branco (Government of Brazil) 1974

Binkley-Stephenson Prize (Organization of American Historians), 1982 

Hoover Institution Prize: Best Article on Latin American International Politics, 1986

Special Humanities Award, Louisiana Endowment for the Humanities, 2000

Notable Articles:
"Military Influence on Brazilian Economic Policy, 1930-1945: A Different View," Hispanic American Historical Review  53 (February 1973)

"The United States, Brazil and the Cold War, 1945-1960: End of the Special Relationship," Journal of American History  68 (December 1981)

"The Armed Forces and Industrialists in Modern Brazil: The Drive for Military Autonomy, 1889-1954," Hispanic American Historical Review 62 (November 1962), reprint in Rank and Privilege: The Military and Society in Latin America (Wilmington, 1994)

Brazil and the Great Powers, 1930-1939: The Politics of Trade Rivalry (Austin: University of Texas Press, 1975)

Hitler's Secret War in South America, 1939-1945: German Military Espionage and Allied Counter-Espionage in Brazil (LSU Press, 1981; paperback editions, Ballantine 1982 and LSU Press 1999)

A Guerra Civil Brasileira: História da Revolução Constitucionalista de 1932 (Rio de Janeiro: Editôra Nova Fronteira, 1982)

Rebelião Vermelha (Rio de Janeiro: Distribuidora Record, 1986)

O Ditador e o Embaixador: Getúlio Vargas, Adolf Berle, e a Queda do Estado Novo (Rio de Janeiro: Distribuidora Record, 1987)

Brazil and the Soviet Challenge, 1917-1947 (Austin: University of Texas Press, 1991)

Oswaldo Aranha: Uma Biografia (Rio de Janeiro: Editôra Objetiva, 1994)