Symposium on Improved Efficiency in Che Management of Water Resources: Follow-up to the Mar del Plata Action Plan.-- Operational Manual Statement for Projects on International Waterways.-- Reports of the International Law Commission.-- Recommendations for the first stage treatment and disposal facilities for the solution of the border sanitation problem at San Diego, California-Tijuana, Baja California.-- Report of the fourteenth session of the Economic Commission for Europe of the Group of Experts on Aspects of Water Quality and Quantity as adopted on 23 May 1986.-- Book review