http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
edited by Jan T.J. Srzednicki and Zbigniew Stachniak.
"List of seminars and courses delivered by Leśniewski at Warsaw University between 1919 and 1939": pages 179-180.
Nijhoff international philosophy series ; v. 24