Davidson's principles and practice of medicine / eds. Nicholas A. Boon ... [et al.] ; illustr. Robert Britton. 20th ed. Edinburgh, U.K. : Elsevier Churchill Livingstone, 2006. xvi, 1381 s. ISBN 0-443-10057-8 (main edition). 0-443-10133-7 (international edition)   [1, z toho voľných 1]