Water Catchment Management 

Australian

• AusStats - Australian Bureau of Statistics
• Australian government statistics
• State of the environment report : Western Australia 2007. Environmental Protection Authority

International

• A dictionary of statistics
• Encyclopedia of life support systems (EOLSS - UNESCO) - A collection of sixteen science,technology and social sciences encyclopedias. To browse individual titles, from the search page select Table of Contents.
• EPA - Envirofacts Data Warehouse
• SourceOECD
• United Nations - Environment Statistics - Country Snapshots

Statistics in print

Australian

State of the environment report : Western Australia 2007. Environmental Protection Authority

International Statistics

Statistical yearbook (Unesco) 1974-1999