Boron chemistry at the beginning of the 21st century / Yu.N. Bubnov, editor-in-chief. (OCLC #910921812)
RDA 11.13.1.8.1 on creating an Access Point for a Single Instance of a Conference, says to add the number, date, and location to the access point for the conference, as in:
111 2_ ǂa International Conference on the Chemistry of Boron ǂn (11th : ǂd 2002 : ǂc Moscow, Russia)