The previous page is sending you to http://livroaberto.ibict.br/bitstream/1/1007/1/Introdu%C3%A7%C3%A3o%20geral%20%C3%A0s%20ci%C3%AAncias%20e%20t%C3%A9cnicas%20da%20informa%C3%A7%C3%A3o%20e%20documenta%C3%A7%C3%A3o.pdf.

 If you do not want to visit that page, you can return to the previous page.