Thực đơn
Hố_xí Tham khảoThực đơn
Hố_xí Tham khảoLiên quan
Tài liệu tham khảo
WikiPedia: Hố_xí http://books.google.ca/books?id=_CkDAwAAQBAJ&pg=PA... http://books.google.ca/books?id=g9tRAgAAQBAJ&pg=PA... http://helid.digicollection.org/en/d/Js13461e/3.4.... http://sanitationdrive2015.org/wp-content/uploads/... http://www.unicef.org/publications/files/JMP_repor... https://web.archive.org/web/20140819084624/http://...