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IWA Navigation 1977
NL 1.1
NL 1.2
NL 2
NL 3.1
NL 3.2
NL 4
NL 6
NL 7.1
NL 7.2
NL 8 original
NL 9 original
NL 10 original
NL 11 original
NL 12 original
NL 13 original
NL 14 original
NL 15 original
NL 16
NL 17 original
NL 18
NL 19
NL 20.1
NL 20.2
NL 20.3
NL 20.4
NL 21.1
NL 21.2
NL 21.3
NL 21.4
NL 22.1
NL 22.2
NL 22.3
NL 22.4
NL 23.1
NL 23.2
NL 23.3
NL 23.4
NL 24.1
NL 24.2
NL 24.3
NL 24.4
NL 25.1
NL 25.2
NL 25.3
NL 25.4
NL 26.1
NL 26.2
NL 26.3
NL 26.4
NL 27.1
NL 27.2
NL 27.3
NL 27.4
NL 28.1
NL 28.2
NL 28.3
NL 28.4
NL 28a
NL 29.1
NL 29.2
NL 29.3
NL 29.4
NL 30.1
NL 30.2
NL 30.3
NL 30.4
NL 31.1
NL 31.2
NL 31.3
NL 31.4
NL 32.1
NL 32.2
NL 32.3
NL 32.4
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