"Kokugoryoku kan" ni kansuru zenkoku chōsa
Subtitle: kenkyū hapyō to bunseki
By: [henshū Kokuritsu Kokugo Kenkyūjo]
Publisher: Kokuritsu Kokugo Kenkyūjo
Published: 2009
Place of publication: Tachikawa-shi
Language: jpn
Number of pages: 75
Subjects: Japanese language; Statistics; Study and teaching; History