Пчелко А. С. Методика преподавания арифметики в начальной школе. — 1951
{"root":"text","url":"pchelko_metodika_prepodavaniya_arifmetiki_v_nachalnoy_shkole_1951","surl-package":"\/text\/%PACKAGE%\/?query=%QUERY%","surl-page":"\/text\/%PACKAGE%\/p%PAGE%\/?query=%QUERY%","query":"\"\"","section":"library","mode-gfx":true,"mode-html":true,"mode-prefer":"gfx","layout-prefer":"1x1","zoom":{"1x1":{"level":100,"_w":false,"_h":true},"2x1":{"level":100,"_w":true,"_h":false},"html":{"level":100}},"textsize-prefer":"2","textfont-prefer":"a","tree-type":"ajax","tree-state":"visible","printbox-state":"hidden","print-allowed":"1","searchbox-state":"hidden","searchbox-type":"inline","goto-pageno":null,"goto-page":"200","defw":"1000","defh":"1597","minh":1597,"maxh":1597,"fixeven":null,"package":"left","sitemode":"live","user":{"uuid":""}}
