(1969). Handbook of magnetic compass adjustment / [by Nye S. Spencer and George F. Kucera].
Cita Chicago (17th ed.)Handbook of Magnetic Compass Adjustment / [by Nye S. Spencer and George F. Kucera]. 1969.
Cita MLA (9th ed.)Handbook of Magnetic Compass Adjustment / [by Nye S. Spencer and George F. Kucera]. 1969.
Atenció: Aquestes cites poden no estar 100% correctes.