Quizá quiso decir: CISM International Centre for Mechanical Sciences, 0254-1971 ; 502 CISM International Centre for Mechanical Sciences, 0254-1971 ; 501 CISM International Centre for Mechanical Sciences, 0254-1971 ; 493 CISM Courses and Lectures, 0254-1971 ; 491 CISM Courses and Lectures, 0254-1971 ; 495 CISM International Centre for Mechanical Sciences, 0254-1971 ; 494 CISM International Centre for Mechanical Sciences, 0254-1971 ; 497 CISM International Centre for Mechanical Sciences, 0254-1971 ; 496 CISM International Centre for Mechanical Sciences, 0254-1971 ; 498 CISM International Centre for Mechanical Sciences, 0254-1971 ; 500 CISM International Centre for Mechanical Sciences, 0254-1971 ; 499 CISM International Centre for Mechanical Sciences, 0254-1971 ; 503 CISM International Centre for Mechanical Sciences, 0254-1971 ; 504 CISM International Centre for Mechanical Sciences, 0254-1971 ; 506 CISM International Centre for Mechanical Sciences, 0254-1971 ; 507 CISM International Centre for Mechanical Sciences, 0254-1971 ; 505 CISM International Centre for Mechanical Sciences, 0254-1971 ; 508 CISM International Centre for Mechanical Sciences, 0254-1971 ; 509 CISM International Centre for Mechanical Sciences, 0254-1971 ; 510 CISM International Centre for Mechanical Sciences, 0254-1971 ; 511