Impact evaluation in vocational education :
the state of the art /
written by John T. Grasso, West Virginia University.
|Main Author:||Grasso, John T.|
Columbus, National Center for Research in Vocational Education, Ohio State University ; for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1979.
Vocational education /
Contract No. OEC-300-78-0032.
Project no. 498AH80003.
viii, 47 p. ;
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