MIL-PRF-89020A (AMENDMENT 1)
MIL-PRF-89020A (AMENDMENT 1), PERFORMANCE SPECIFICATION: DIGITAL TERRAIN ELEVATION DATA (27 APR 1999) ., This amendment forms part of MIL-PRF-89020A, dated 19 April 1996, and is approved for use by all Departments and Agencies of the Department of Defense.
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