Describe the subject encyclopedia that you used to find background/overview information about your topic.
There are many reference books listed in the individual Resource Guides. For the topic of aggression and children, you could check the Resource Guide for Psychology.
You can also ask for assistance in identifying and locating an appropriate subject encyclopedia.
The Encyclopedia of Psychology would be a good subject encyclopedia for this topic.
Check the index in the back of the last volume and look up aggression. There is a "see" reference to violence and aggression.
