00398nam a22001217a 4500008004100000040005500041080002200096245006000118260004500178300001500223500001100238700002700249240606b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a616.899.001.5(05)  aInternational review of research in mental retardation   aNew York: bAcademic Press, Inc., c1970  axv, 392p.   aVol. 4  aEllis, Norman R (Ed.)