Nested view required

I am new in drupal.

I want to create a view in drupal-6 for my three content types which are integrated with each other by node reference(CCK). I have contents types 1) Topic 2) Room 3) Time slot

I want the schedule to be grouped by topic (a fiel开发者_高级运维d in the room node), then by room name, thusly:

* [topic 1]
      o [room 1]
            + [timeslot 1 & related data in class]
            + [timeslot 2 & related data in class]
      o [room 2]
            + [timeslot 1 & related data in class]
            + [timeslot 2 & related data in class]
* [topic 2]
      o [room 1]
            + [timeslot 1 & related data in class]

Thanks in advance, Kashif

I'm not sure if this will work, but two possibilities come to my mind:

1. create a view of the room nodes, add a relationship with the timeslot nodes and group by the topic nodes.
2. create a view of topic nodes, add a relationship with the room nodes and add a relationship with timeslot nodes on the first relationship.