Examples for Field 181 (Heading - Geographic Subdivision):

181  ##  $zTahiti

181  ##  $zGermany$xHistory$y1933-1945

181  ##  $zCalifornia$zSan Francisco

181  ##  $zAntarctica$zWeddell Sea Region

181  ##  $zForeign countries

181  ##  $zForeign countries$xHistory and criticism