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→References and external links
* Mara, DD. (1996). Low-Cost Urban Sanitation. Wiley, Chichester, UK. (Provides detailed drawings of Indian glass-fibre squat pan and trap with dimensions and critical design criteria. A description of how to modify a Pour Flush Toilet to a cistern Flush Toilet is included.)
* Roy, AK., et al. (1984). Manual on the Design, Construction and Maintenance of Low-Cost Pour Flush Waterseal Latrines in India (UNDP Interreg. Project INT/81/047). The World Bank + UNDP, Washington.(Provides specifications for Pour Flush Toilets and connections.). Available in the IRC Digital Library, [http://www.irc.nl/docsearch/title/108815].