. "Usson"@fr . "1734"^^ . "1734"^^ . "Usson (marquis de Bonnac ; 1734-1821)"@fr . "1821"^^ . "1821"^^ . . . "2018-04-09" . "13475489" . "2018-04-09" . "13475489" . . . . "Usson" . . "1821"^^ . "1734"^^ . "http://catalogue.bnf.fr/ark:/12148/cb13475489m" .