World Congress on the Theory of Machines and Mechanisms.World Congress on the Theory of Machines and Mechanisms (7th : 1987 : Spain)：the theory of machines and mechanisms．V.1.Pergamon,1987.
World Congress on the Theory of Machines and Mechanisms.World Congress on the Theory of Machines and Mechanisms (7th : 1987 : Spain)：the theory of machines and mechanisms．V.2.Pergamon,1987.
World Congress on the Theory of Machines and Mechanisms.World Congress on the Theory of Machines and Mechanisms (7th : 1987 : Spain)：the theory of machines and mechanisms．V.3.Pergamon,1987.
