TY - BOOK AU - Jensen, Robert J. AU - Wagner, Sigrid ED - National Council of Teachers of Mathematics Research Interpretation Project TI - Research ideas for the classroom : early childhood mathematics SN - 0-02-895794-6 PY - 1993/// CY - New York PB - MacMillan Library Reference KW - 51:372.851 KW - int KW - eng KW - 372.851:51 KW - fre ER -