TY  - BOOK
AU  - Callahan,Leroy G
AU  - Glennon,Vincent Joseph
TI  - Elementary school mathematics: a guide to current research 
AV  - QA135 .E446 1975
PY  - 1975///
CY  - Washington
PB  - Association for Supervision and Curriculum Development
KW  - Mathematics
KW  - Study and teaching (Elementary)
N1  - Previous editions by V. J. Glennon and L. G. Callahan; Published in 1952 and 1958 under title: What does research say about arithmetic?; 4; Bibliography: pages 151-182; 2
ER  -