by E. Randolph McFarland ; prepared in cooperation with the Virginia Department of Environmental Quality and the Hampton Roads Planning District CommissionU.S. Dept. of the Interior, U.S. Geological Survey2010
edited by J. Wright Horton, Jr., David S. Powars, and Gregory S. Gohn ; prepared in cooperation with the Hampton Roads Planning District Commission, Virginia Department of Environmental Quality, and National Aeronautics and Space Administration Langley Research CenterU.S. Dept. of the Interior, U.S. Geological Survey2005