Sylvia Warblers. By Hadoram Shirihai, Gabriel Gargallo, and, Andreas J Helbig; illustrated by, Alan Harris; photographic editor and field photographer:, David Cottridge; distribution maps by, C S Roselaar; edited by, Guy M Kirwan and, Lars Svensson. Princeton (New Jersey): Princeton University Press. $75.00. 576 p; ill.; index. ISBN: 0–691–08833–0. 2001.