department.

The latest edition was released in 1997, revised by Donald J. Zeigler, Ph.D Professor of Geography at Old Dominion University, contained over 54,000 entries. The dictionary has currently over 54,000 alphabetically arranged entries of mountains, lakes, towns, and countries. It includes almost all places in the United States with a population greater than 2,500. The threshold for inclusion of places outside the U.S. varies (from those over 4500 in Canada to those over 100,000 in Bangladesh