Grids and magnetic declinations ...

By: Material type: TextTextSeries: United States. Memorandum ; no. 425. 4th ed.Publication details: [Washington, 1945]Description: 89 p. illus., fold. maps. 27 cmSubject(s): LOC classification:
  • UG470 .U5 no. 425
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"Amendment no. 1" ([2] p.) inserted.

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