References  
Ludwig, Art. Builder's Greywater Guide: Installation of Greywater Systems in New Construction and Remodeling. Santa Barbara: Oasis Design, 1995.  
   
Ludwig, Art. Create an Oasis with Greywater: Your complete Guide to Choosing, Building and Using Greywater Systems. Santa Barbara: Oasis Deign, 2000.  
   
Lehr, Valentine A. "Grey Water Systems." American Society of Sanitary Engineering 1986, online 31 Jan. 2001.  
   
Ludwig, Art. Builder's Greywater Guide: Installation of Greywater Systems in New Construction and Remodeling. Santa Barbara: Oasis Design, 1995.  
   
Ludwig, Art. Create an Oasis with Greywater: Your complete Guide to Choosing, Building and Using Greywater Systems. Santa Barbara: Oasis Deign, 2000.
 
   
Washington State Department of Health - Office of Environmental Health & Safety
Wastewater Management Program
http://www.doh.wa.gov/ehp/ts/waste.htm
 
   
"Water Conserving On-Site Wastewater Treatment Systems"
http://www.doh.wa.gov/ehp/ts/WW/WaterConservSystems-2000.pdf

 
   
Campbell, Craig and Michael Ogdon. Constructed Wetlands in the Sustainable Landscape. John Wiley & Sons, NY. 1999.  
   
The Humanure Handbook. Jenkins Publishing, PO Box 607, Grove City, PA 16127. To order, phone: 1-800-639-4099. www.jenkinspublishing.com  
   
http://www.rmi.org RockyMountain Institute: a nonprofit organization that fosters the efficient and restorative use of resources to create a more secure, prosperous, and life-sustaining world  
   
http://www.greenbuilder.com Sustainable Building Sourcebook  
   
http://www.sustainable.doe.gov Center for Excellence in Sustainable Development  
     
  http://www.clivusmultrum.com  
     
 

http://www.epa.gov/

 
     
 

http://www.greywater.com/

 
     
 

http://www.nutricyclesystems.com/

 
     
 

http://www.oasisdesign.net

 
     
  http://www.riles.org