00878cam a2200253   4500001001300000003000400013005001700017008004100034010002200075040007000097043001200167050001500179082001400194110006200208245005300270260008000323300002700403350000900430500001600439650004400455650004000499650004400539650004100583hew68000126 DLC20260227111517.0690307s1968    dcua          00000 eng c  ahew68000126 //r85  aU.S. Dept. of Health, Education and Welfare. Library  L112.A71358  an-us---0 aL112b.A48  a370/.78/410aUnited States.bOffice of Education.bBureau of Research.10aResearch and development: advances in education.0 aWashington,bFor sale by the Supt. of Docs., U.S. Govt. Print. Off.,c1968.  a107 p.billus.c24 cm.  a1.50  a"OE 12034." 0aEducational innovationszUnited States. 0aEducationxResearchzUnited States. 4aEducational innovationszUnited States. 4aEducational researchzUnited States.