TY  - BOOK
ED  - United States.
TI  - Research and development: advances in education
AV  - L112 .A48
U1  - 370/.78/4 
PY  - 1968///
CY  - Washington
PB  - For sale by the Supt. of Docs., U.S. Govt. Print. Off.
KW  - Educational innovations
KW  - United States
KW  - Education
KW  - Research
KW  - Educational research
N1  - "OE 12034."
ER  -