7Ipswich River Fisheries Restoration Task Group. Ipswich River Fisheries Current Status and Restoration Approach[ EB/OL]. [ 2009-03-10 ]. http://www, mass. gov/dfwele/der/riverways/ programs/riffs/If_ipswich, htm.
8EDGE C E I. Water wars heat up[EB/OL]. [2003-05-21 ]. http://ceiengineers, com/publications/EE 1203.
9DFID of the UK. Handbook for the assessment of catchment water demand and use[ M]. Oxon: HR Wallingford, 2003.