The publications are grouped into four categories: by author(s), by specific locations in Puerto Rico and the U.S. Virgin Islands, by discipline of interest (climate and geomorphology, floods, geology, ground water, groundwater level, groundwater modeling, sediment, surface water, water quality, and water use), and publication by series or type. For the reader's information, a list of approved reports pending publication is included. As these reports are completed and printed, they will be available for distribution.