First circular /
[by] the Organizing Committee]
APA Citation
International Geological Congress (24th : 1972 : Montréal, Q. (1969). First circular. Ottawa: [s.n.].
MLA Citation
International Geological Congress (24th : 1972 : Montréal, Québec). First Circular. Ottawa: [s.n.], 1969.
Warning: These citations may not always be complete (especially for serials).