[Koha] biblio.datecreated and biblio.timestamp created but not displayed

[samuel desseaux]

hi,

When i create a record,  biblio.datecreated and biblio.timestamp (099$c 
099$d) are well created in the database but not displayed in the marc file.

All seems to be ok but we have to add manually the date.

  I think it's a question of xsl but, in this case, which file can i modify?

Best regards,

samuel