Q. How do I access the Hague Academy of Collected Courses?

Yes, this publication is available through the Brill Reference Works database.  Use the "View Online" link in this HOLLIS+ record:

http://id.lib.harvard.edu/aleph/000114566/catalog 

Note that the official title of this publication in HOLLIS+ is its French name, Recueil des Cours.  There are also two English names for this publication, Hague Academy Collected Courses and Collected courses of the Hague Academy of International Law.

Remember, if you are using a computer that is not on the Harvard network, you need to log into HOLLIS+ first with your HUID \ HarvardKey and PIN so that it knows that you are a Harvard affiliate.