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His extensive notes of the TRC methods for regulation of production to maximise recovery served him well both in Venezuela and later when he took them translated into Arabic to the Cairo meeting that served as launching platform for OPEC and where Wanda Jablonski introduced him to then minister of petroleum of Saudi Arabia, Abdullah Tariki, co-founder of OPEC.
She is credited with arranging the 1959 meeting of oil ministers Abdullah Tariki, Juan Pablo Pérez Alfonso, and others to sign the "Gentleman’s Agreement," a precursor of OPEC.