Classification for international law based on Elsie Basset's outline of topic headings for books on international law and relations, in classified form, and expanded - Schwerin, Kurt, 1902- (Charlottesville Univ. of Virginia Law Library, 1947)
"Outline of topic headings for books on international law and relations in classified form" is Appendix 2 of "A cataloging manual for law libraries," by Elsie Basset.