TT-I-521 › Ink, Copying & Record
TT-I-521
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REVISION A
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CURRENT
Included in this current edition are the following subparts:
AMENDMENT 1 - Jan. 30, 1940
REVISION A - May 20, 1959
BASE - Jan. 1, 1960
REV A AMENDMENT 1 - Dec. 27, 1967
REVISION A - May 20, 1959
BASE - Jan. 1, 1960
REV A AMENDMENT 1 - Dec. 27, 1967
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Document Number
TT-I-521
Revision Level
REVISION A
Status
Current
Publication Date
May 20, 1959
Page Count
6 pages