BIBCYT http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Ultimo&Nombrebd=BIBCYT UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno Amant, Robert St. stamant@csc.ncsu.edu P Principal Lieberman, Henry lieber@media.mit.edu P Principal Potter, Richard potter@cs.umd.edu P Principal Zettlemoyer, Luke lszettle@eos.ncsu.edu P Principal VISUAL GENERALIZATION IN Programming BY Example. Vol: 43 pp. 107-114