20220108163500.0 Jōetsu Kyōiku Daigaku kenkyū kiyō (Jōetsu. 1990) 0915-8162 Japan Jōetsu Kyōiku Daigaku kenkyū kiyō (Jōetsu. 1990) 0286-6161 0915-8162 Jōetsu Kyōiku Daigaku kenkyū kiyō. 0915-8162 Jōetsu Kyōiku Daigaku kenkyū kiyō. 0915-8162