Washington, D.C. : Division of Law and Treaties, Department of International Law, Pan American Union, 1953. [Buffalo, New York] : William S. Hein & Co., [between 2009 and 2013]
"The nineteenth in the series initiated by the Inter-American Development Commission and now continued by the Division of Law and Treaties in the Department of International Law of the Pan American Union." AVAILABLE ONLINE TO AUTHORIZED PSU USERS.