The processing of the papers that are submitted to the Electronic Journal of Combinatorics requires, in addition to a great deal of work on the part of our distinguished Editorial Board, a considerable number of external referees. We are pleased to acknowledge the assistance of the following persons who have acted as referees for the Journal. Their dedicated and careful efforts are what make this Journal possible and maintain its quality at the highest level:

Michael Albertson, David Aldous, Lowell Beineke, Christine Bessenrodt, Sara Billey, Peter Borwein, Francesco Brenti, David Bressoud, Graham Brightwell, Andries Brouwer, Arturo Carpi, Pascale Charpin, Guantao Chen, Charles Colbourn, Tristan Denley, Jacques Desarmenien, Michael Doob, Roger Entringer, Philippe Flajolet, Sergey Fomin, Frank Garvan, Ira Gessel, Wayne Goddard, Jay Goldman, Sid Graham, Ed Green, Curtis Greene, Jerry Griggs, Viatcheslav Grishukhin, Richard Guy, Laurent Habsieger, Willem Haemers, Mark Haiman, Guo-Niu Han, Phil Hanlon, David Hartvigsen, Dieter Jungnickel, Rainer Kemp, Adalbert Kerber, Jenny Key, Jeong Han Kim, Alexander Kirillov, Peter Kirschenhofer, Paul Klingsberg, Kazuhiko Koike, Mikhail Kolountzakis, Christian Krattenthaler, Gilbert Labelle, Jacques Labelle, Jeffrey Lagarias, Esther Lamken, Alain Lascoux, Felix Lazebnik, Bernard Leclerc, Daniel Loeb, Tomas Luczak, Colin Mallows, G. E. Moorhouse, Ronald Mullin, Bogdan Oporowski, Peter Paule, Tim Penttila, Kevin Phelps, C. Pomerance, Cheryl Praeger, Robert Proctor, Helmut Prodinger, Jamie Radcliffe, Stanislaw Radziszowski, Don Rawlings, K. Brooks Reid, Jeff Remmel, Gordon Royle, D.P. Sanders, Carla Savage, Thomas Scharf, Eric Schmutz, Peter Shor, Rodica Simion, K. Soundararajan, Tom Spencer, Matt Squire, Dennis Stanton, John Stembridge, Leo Storme, Benny Sudakov, Prasad Tetali, Jean-Yves Thibon, Vladimir Tonchev, Michelle Wachs, Chi Wang, Bill Watkins, Mark Weiss, Dominic Welsh, Geoff Whittle, Laurence Wolsey, Yeong-Nan Yeh, Dan Younger, Andrei Zelevinski, Jiang Zeng, Karl-Heinz Zimmermann.