@article {3492, title = {Les agrandissements de la Biblioth{\`e}que nationale {\`a} Paris}, journal = {La Nature}, number = {II}, year = {1879}, pages = {329-330}, url = {http://cnum.cnam.fr/CGI/fpage.cgi?4KY28.13/333/100/436/8/421}, author = {Charles Letort} }