[Koha-devel] Author field problem

Hello I am currently trying to identify the Marc Record fields we will use to fill the database. (using koha 1.9.2) The default field used to fill the author name (biblio.author) is 127z. The field does not seem to be appropriate, so we are currently using another field: 410a. But we am not satisfied with this one, which seems to be the author of the collection, not the book itself. My question is: is there another unimarc field reserved for the author name ? Thanks Michel LERENARD