Knee Joint Troubles in Tea Pickers - TORII, Suguru; KUNOGI, Jun-ichi; KATSUMOTO, Hiromu; YOSHIKAWA, Yukio; HARADA, Rikizo; SUYAMA, Tetsuo; SHIMOJO, Hitoshi; SATO, Ikuo; KODAMA, Misuzu (JOURNAL OF THE JAPANESE ASSOCIATION OF RURAL MEDICINE, 1986)