00538nam a22001457a 4500008004100000020001500041050002400056100002400080245008500104250001200189260003900201300007400240650003800314650004000352160927b        xxu||||| |||| 00| 0 eng d  a0130129380  aLC 3981 b.H49 2000  aHeward, William L.   aExceptional children :ban introduction to special education/cWilliam L. Heward  a6th ed.  aUpper saddle river:bMerril,c2000  axxii, 632p. :ill. ;bBibliographical references and index.c21cm.ecd  aspecial educationxUnited states.  aExeptional childrenxUnited states.