Provider: Japan Science and Technology Agency Database: J-STAGE Content:text/plain; charset="utf-8" TY - JOUR TI - Two Textbooks TI - AU - Sakoda,Akito JO - Zairyo-to-Kankyo VL - 68 IS - 5 SP - 109 EP - 109 PY - 2019 DO - 10.3323/jcorr.68.109 ER -