TT-I-521A (AMENDMENT-1), FEDERAL SPECIFICATION: INK, COPYING AND RECORD (24-DEC-1967) [USE TT-I-00521A (AMENDMENT-1) IN LIEU OF TT-I-521] [NO S/S DOCUMENT]
TT-I-521A (AMENDMENT-1), FEDERAL SPECIFICATION: INK, COPYING AND RECORD (24-DEC-1967) [USE TT-I-00521A (AMENDMENT-1) IN LIEU OF TT-I-521] [NO S/S DOCUMENT].