It is managed by the Centre INRA de Nancy and open on the third Saturday of the warmer months ; an admission fee is charged .
The Centre INRA de Nancy is a branch of the Institut National de la Recherche Agronomique ( INRA ) .
It is managed by the Centre INRA de Nancy , a branch of the Institut National de la Recherche Agronomique ( INRA ) , and open on the third Saturday of the warmer months ; an admission fee is charged .