TY - BOOK AU - Billstein,Rick AU - Libeskind,Shlomo AU - Lott,Johnny W. TI - A problem solving approach to mathematics for elementary school teachers SN - 0805303901 PY - 1990/// CY - Menlo Park, Calif. PB - Benjamin/Cummings Pub. Co. KW - Mathematics KW - Study and teaching (Elementary) KW - 1961- KW - Problem solving N1 - Includes bibliographical refrences and index ER -