Ngā hua rapu - (( (bibliography OR geography) 20th century ) OR ( bibliography 20th century ))~
Kāore tō rapu - (( (bibliography OR geography) 20th century ) OR ( bibliography 20th century ))~ - i ōrite ki tētahi rauemi.
Me whakamātau pea he takikupu rerekē:
- bibliography 20th »
Ka taea pea ētahi hua anō mā te whakakē i tō uiui rapu.
- Kā taea pea e ngā kupu AND, OR me NOT tō rapu te whakapōraru; tāpiritia he tohukī: "(( (bibliography OR geography) 20th century ) OR ( bibliography 20th century ))~".
- Mā te tāpiri tohu kārimākā e tikia atu ai pea ngā rerekētanga ā-rohe: (( (bibliography OR geography) 20th century ) OR ( bibliography 20th century ))*.