How the parameter is related to the data in the tables?

>I just can't figure this one out! I have the following tables:
>
>Contacts
> id int,
> lastname varchar(255),
> ...
>
>qualifier
> id int,
> description varchar(255),
> ...
>
>ContactQualities
> contactid int,
> qualifierid int,
> ...
>
>I need to formulate a SQL stored procedure which will produce a cursor of contacts which have a list of qualities.
>
>parameter looks like this
> '01,05...'
>
>Any suggestions?