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{{Bibliographic Record
|Title=International Encyclopedia of Unified Science
|Resource Type=journal article
|Author=Rudolf Carnap, Philipp Frank, Joergen Joergensen, Charles W. Morris, Otto Neurath, Louis Rougier,
|Year=1937
|DOI=10.1126/science.86.2235.400
|Journal=Science
|Volume=86
|Number=2235
|Pages=400-401
}}