TY  - BOOK
AU  - Higgins,Jon L
AU  - Sachs,Larry A.
TI  - Mathematics laboratories: 150 activities and games for elementary schools 
AV  - QA139 .M384 1974
PY  - 1974///
CY  - Columbus, Ohio
PB  - ERIC Information Analysis Center for Science, Mathematics, and Environmental Education, Ohio State University
KW  - Mathematics
KW  - Study and teaching (Elementary)
KW  - Problems, exercises, etc
N1  - 2
ER  -