icon_export/16/menu
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Menu
icon_export/16/close
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Close
icon_export/16/user
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Login
icon_export/16/cart
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Cart
icon_export/16/search
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Search Tips
Advanced Search
icon
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Preview
icon_export/16/doctype
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Standard
icon_export/16/info
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UPDATE AVAILABLE
AS 1683.20-1980
[Superseded]
Published:
01/01/1980
Pages:
2
Content history
Content history
AS 1683.20-2001
[Withdrawn]
ISO 471:1977
[Withdrawn]
ISO 554:1976
[Withdrawn]
ISO 139:1973
[Superseded]
ISO 471
