542,514 LENMAN JOHN ANDREW REGINALD, RITCHIE ANTON ELLIOT Clinical electromyography / J.A.R. Lenman, A. E. Ritchie ; with a forew. by J. A. Simpson. -3 ed. [London] : Pitman Books Ltd., [1983]. - XV, [1], 239 s. : il./wykr.; 24 cm ISBN 0-272-79708-1