000 00338nam a2200097 4500
245 _aRecent research in number learning
_cedited by Thomas E. Kieren
710 _aKieren, Thomas E.
260 _aOhio,
_bERIC Clearinghouse for Science, Mathematics & Environmental Education.
_c1980
300 _av,173p.: tables; 22cm
082 _a512.7071
_bKIE
999 _c64532
_d64532