The Merck manual of diagnosis and therapy /
The Merck manual of diagnosis and therapy / Robert S. Porter, MD, editor-in-chief ; Justin L. Kaplan, MD, deputy editor-in-chief, Richard B. Lynn, MD, and Madhavi T. Reddy, MD, senior assistant editors. - Twentieth edition. - xxviii, 3530 pages, 14 pages of color plates : illustrations (some color) ; 25 cm.