KRYGER HEIR H. 803,934 Principles and practice of sleep aedlclne / [ed. by] Heir H. Kryger, Thoaas Roth, Wllllaa C. Deaent. - 2 ed. - Philadelphia [etc.] t W.B. Saunders Co., [1994]. - XXXIX, 1067 s. ; 11., wykr. i 28 cm ISBN 0-7216-4217-9