This bibliography is a revised version of the JESS bibliography that was published in 1986, relating specifically to social and environmental systems in Somalia as well as river basin assessment and planning, in general. Many new references have been added and the bibliography has been organized into 22 different sections, corresponding to the subject codes (BIBCODE) being used by the JESS team in Somalia. In each section, citations are listed alphabetically by author or issuing body, and citations dealing specifically with Somalia have been separated from other references within the same section. Each citation is listed only once even if it is multidisciplinary and since it was impossible to secure copies of all references cited, many are simply classified according to the informarion contained in the title. brThe bibliography includes selected monographs, conference papers, journal articles. book chapters. reports, JESS studies and dissertations.