01273nam a2200313Ia 450000100060000000300050000600500170001100800410002801000130006902000150008203500190009704000180011604300120013405000170014608200150016308600200017811000470019824501020024526001880034730000150053550000630055050000170061350000240063050500890065465000480074365000520079171000530084374000630089620851BIBL20160527194350.0720818m19709999dcu           00010 eng    a72183665  bpbk.c1.20  a(OCoLC)0589673  aDLCcDLCdGPO  an-us---0 aLA217b.E364  a375/.00973  aHE 19.312:BRS-120aEducation Commission of the States.2Local10aNational assessment of educational progressba project of the Education Commission of the States.0 aWashingtonb[U.S. Dept. of Health, Education, and Welfare, Education Division] National Center for Education Statistics : for sale by the Supt. of Docs., U.S. Govt. Print. Off.c1970-  av.c28 cm.  aContract agency: National Center for Education Statistics.  aItem 461-A-8  aS/N 017-080-01535-80 aBackround report no. BRS-1. Science achievment: racial and regional trends, 1969-73. 0aEducationzUnited StatesxCurricula.2Local 0aSciencezUnited StatesxAbility testing.2Local20aNational Center for Education Statistics.2Local00aScience achievment: racial and regional trends, 1969-1973.