TY  - BOOK
AU  - KOKURITSU KOKUGO KENKYUJO
TI  - Danwa no kenkyu to kyoiku. Vol. 1
U1  - P42:1, M7.1 
PY  - 1987///
CY  - Tokyo
PB  - Kokuritsu Kokugo Kenkyujo Japan   
KW  - JL
ER  -