00914nas 2200349 c 450 991039714360332120200608105215.0(CKB)1000000000287809(OCoLC)643686251(DE-101)985717726(DE-599)ZDB2387724-8(EXLCZ)99100000000028780920070917b19521955 |y |engur|||||||||||txtrdacontentcrdamediacrrdacarrier算数教育 [[サンスウキョウイク]]Tōkyō1952-1955Online-Ressource0403-0427 Zeitschriftgnd-content510Nihon-Sūgaku-Kyōiku-Gakkaiisb8999DE-1014022JOURNAL9910397143603321算数教育2951564UNINA