There are special tools - make use of them!
If you are current Oxford University member and find useful articles in journals to which the Bodleian does not have a subscription consider an Inter-Library Loan
Journal issues from 2000 onwards are on Floor 1; pre 2000 issues are on the Ground Floor.
Country specific law journals will have shelf marks starting eg Nigeria 300. Comparative law journals have shelf marks beginning General 300.
eg Annual Survey of African Law v.1(1967)-v.7(1973) General 300 A90 is on the Ground Floor.
Please ask a member of staff for directions when you visit the Law Bod.
There are too many for any list to be comprehensive (below are a couple known to - and gratefully used by - us). If you are studying a particular legal topic, or a foreign jurisdiction, it may well be worth considering which law firms have gained a distinguished reputation in the same topic/jurisdiction, they may well have partners/practitioners posting news and comment.