Referencias


 * http://www.youtube.com/watch?v=NcZErQcIpwI
 * http://www.youtube.com/watch?v=S7yjrW8QC5k
 *  http://www.photovisi.com
 *  http://www.bls.gov/k12/azlist.htm
 * http://www.google.co.cr/search?sourceid=navclient&aq=4h&oq=&hl=es&ie=UTF-8&rlz=1T4GGIE_esCR364CR365&q=occupations+definition+for+kids