 Francois Quesnay had developed a cruder version of this technique called Tableau économique, and Léon Walras's work "Elements of Pure Economics" on general equilibrium theory also was a forerunner and made a generalization of Leontief's seminal concept.Alexander Bogdanov has been credited with originating the concept in a report delivered to the All Russia Conference on the Scientific Organisation of Labour and Production Processes, in January 1921.This approach was also developed by L. N. Kritsman and T. F. Remington, who has argued that their work provided a link between Quesnay's tableau économique and the subsequent contributions by Vladimir Groman and Vladimir Bazarov to Gosplan's method of material balance planning.