Maurice Halperin

From the Hispanic American Historical Review, 1995:

A noted expert on Latin American affairs, Maurice Halperin, passed away in February 1995. Halperin was born in Boston in 1906 in an immigrant family. His scholarly interest in Latin America began at the University of Oklahoma.

From the New York Times:

During World War II, Mr. Halperin, who did undergraduate work at Harvard University and held a doctorate from the Sorbonne, was chief of the Latin American division of the Office of Strategic Services (precursor to the CIA.) After the war, he worked at the State Department until 1949, when he became chairman of Latin American studies at Boston University.

Books by Dr Maurice Halperin ( all of them eagerly consulted and sourced by his "expert" colleagues:)

The Rise and Decline of Fidel Castro: An Essay in Contemporary History

The Taming of Fidel Castro

Return to Havana: The Decline of Cuban Society Under Castro

From The Venona Secrets:

Venona messages decoded after the war reveal a number of reports that the NKVD received from Maurice Halperin, whose code name was Zayats...Elizabeth Bentley told the FBI that Halperin of the Perlo spy ring was a Communist party member and had supplied her with OSS information.

Too bad Chris Simmons wasn't around in the 40's