TY  - BOOK
AU  - Hayden,Alice Hazel
AU  - Torkelson,G.M.
TI  - Systematic thinking about education
T2  - PDK fastbacks
AV  - LB1028.3 .H39
U1  - 371.3/078 
PY  - 1973///]
CY  - [Bloomington, Ind.
PB  - Phi Delta Kappa Educational Foundation
KW  - Educational technology
KW  - Local
N1  - Bibliography: p. 34
ER  -