TY  - BOOK
AU  - Boning, Richard A.
TI  - Using guide words: D1 through D4 
SN  - 0879666110
AV  - LB 1575.37  .B715 1981
U1  - TR 372.6s  
PY  - 1981///
CY  - New York : 
PB  - Barnell Loft Ltd., 
KW  - Reading
KW  - Programmed instruction.
KW  - Study and teaching (Elementary).
N1  - Faculty
ER  -