The Research and Training Center on Family Support and Children’s Mental Health at Portland State University has been actively conducting research for 25 years. We’ll let their About Us page introduce them:
The Center is dedicated to promoting effective community-based, culturally competent, family-centered services for families and their children who are, or may be affected by mental, emotional or behavioral disorders.
In their many years of research, they’ve created a fabulous library of books, reports, articles, guides, fact sheets, and more. Many of their publications are available to download free of charge! Search their collection at http://www.rtc.pdx.edu/pgPublications.php
The RTC also sponsors a national conference, coming up on June 23-25.
Collection Spotlight from the National Rehabilitation Information Center 
Thanks for the useful info. It’s so interesting