Changes

* ARGOSS (2001). [http://nora.nerc.ac.uk/id/eprint/20757/1/ARGOSS%20Manual.PDF Guidelines for Assessing the Risk to Groundwater from on-Site Sanitation]. British Geological Survey Commissioned Report, CR/01/142, Keyworth, UK. :Available at: [http://www.bgs.ac.uk bgs.ac.uk]

* Brandberg, B. (1997). Latrine Building. A Handbook for Implementation of the Sanplat System. Intermediate Technology Publications, London, UK. (A Book; a good summary of common construction problems and how to avoid mistakes)

* Franceys, R., Pickford, J. and Reed, R. (1992). [https://www.susana.org/_resources/documents/default/2-1651-who-a-guide-to-the-development-of-on-site-sanitation.pdf A Guide to the Development of on-Site Sanitation]. WHO, Geneva, CH. (For information on accumulation rates, infiltration rates, general construction and example design calculations):Available at: [http://www.susana.org/library susana.org/library]

* Graham, J. P. and Polizzotto, M. L. (2013). [https://pubmed.ncbi.nlm.nih.gov/23518813/ Pit Latrines and Their Impacts on Groundwater Quality: A Systematic Review]. Environmental Health Perspectives, National Institute of Environmental Health Sciences, Research Triangle Park, US. :Available at: [http://www.ehponline.org ehponline.org]

* Pickford, J. (1995). Low Cost Sanitation. A Survey of Practical Experience. Intermediate Technology Publications, London, UK. (Book; Information on how to calculate pit size and technology life)

* Robens Institute (1996). [http://helid.digicollection.org/en/d/Js13461e/3.4.html Fact Sheets on Environmental Sanitation. Fact Sheet 3.4: Simple Pit Latrines]. University of Surrey, UK and WHO, Geneva, CH. :Available at: [http://www.who.int who.int]