TY  - BOOK
AU  - Chinn,W.G.
AU  - Psyzka,R.H.
AU  - Smith,L.W.
ED  - School Mathematics Study Group
TI  - The programmed learning project / 
U1  - 372.7 SCH 
PY  - 1966///
CY  - Stanford : 
PB  - Stanford University , 
KW  - Mathematics
KW  - Study and teaching (Elementary)
ER  -