Lectures on conditioned reflexes [1], twenty-five years of objective study of the higher nervous activity (behaviour) of animals / Ivan Petrovitch Pavlov,... ; translated and edited by W. Horsley Gantt,... ; with the collab. of G. Volborth,... ; and an introduction by Walter B. Cannon,... / London : Lawrence & Wishart , impr. 1963, cop. 1928