Law reviews are scholarly publications, usually edited by law students in conjunction with faculty members. They contain both lengthy articles and shorter essays by professors and lawyers, as well as comments, notes, or developments in the law written by students. Law review articles often focus on new or emerging areas of law. Many times, they can offer more critical commentary than a legal encyclopedia or ALR (American Law Report) entry. Some law reviews are dedicated to a particular topic, such as gender and the law or environmental law, and will include in their contents the proceedings of a wide range of panels and symposia on timely legal issues.

Law reviews are a secondary source. They are valuable for the depth in which they analyze and critique legal topics, as well as their extensive references to other sources, including primary sources. 

Courtesy of Harvard Law School Library: https://guides.library.harvard.edu/c.php?g=309942&p=2070278

To find a law review article:

1. Begin on the Nexis Uni home page
2. Under "What are you Interested In?" select "Law Reviews"
3. Under "Search in all Law Reviews for" type in your search terms
4. Under "...from how long ago" select date range from drop down
5. Click "Search" 
6. Narrow/limit your search using options on the left