TY  - BOOK
AU  - Huinker .M.Dann
AU  - krause f.eugene 
TI  - Investigations in Mathematics for Elementary Teachers 
SN  - 0669248843
AV  - QA39 .2.K69169 1991
PY  - 1991///
CY  - Toronto 
PB  - Lexington
N1  - includes bibliographical references (p. 294
ER  -