Ngā kaupapa kua whakahuatia i roto i tō rapu.
Telegraph
30
Law and legislation
21
History
14
Telephone
11
Telegraph, Wireless
6
Radio
5
Cables, Submarine
4
Cipher and telegraph codes
3
Technological innovations
3
Telecommunication
3
Economic aspects
2
Electrical engineering
2
Government ownership
2
Public service commissions
2
Social aspects
2
Telecommunication systems
2
Telegraph lines
2
Wages
2
Aeronautics, Military
1
Annotations and citations (Law)
1
Arbitration (International law)
1
Armed Forces
1
Bailments
1
Carriers
1
Communication
1
Communication and technology
1
Communication of technical information
1
Communication systems
1
Competition
1
Competition, International
1
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1
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2iPukapuka
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3
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4
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5I whakaputaina 1884iPukapuka
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6
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7
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8
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9I whakaputaina 1885iPukapuka
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10
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11
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12
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13
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14
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15I whakaputaina 1924iPukapuka
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16
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17
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18
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19
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20