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WikiPedia: Joseph_Louis_Lagrange //nla.gov.au/anbd.aut-an35856215 http://aleph.nkp.cz/F/?func=find-c&local_base=aut&... http://www-gdz.sub.uni-goettingen.de/cgi-bin/digbi... http://catalogo.bne.es/uhtbin/authoritybrowse.cgi?... http://catalogue.bnf.fr/ark:/12148/cb12125247f http://data.bnf.fr/ark:/12148/cb12125247f http://www.idref.fr/029680271 http://id.loc.gov/authorities/names/n86803071 http://map.gsfc.nasa.gov/m_mm/ob_techorbit1.html http://www.maths.tcd.ie/pub/HistMath/People/Lagran...