Rural latrine systems, a pilot project in the Ryukyu Islands.
D005202:Asia, Eastern; D006725:Hookworm Infections / Q000517:prevention & control; D006801:Humans; D007411:Intestinal Diseases, Parasitic / Q000517:prevention & control; D010865:Pilot Projects; D012423:Rural Health; D012498:Sanitary Engineering; D014038:Toilet Facilities