Library, 1. L. I. I. Surveying: Theory and practice. Philadelphia, Pa. : Lefax.
Cita Chicago (17th ed.)Library, 11674 Lefax Instant Information. Surveying: Theory and Practice. Philadelphia, Pa. : Lefax.
Cita MLA (9th ed.)Library, 11674 Lefax Instant Information. Surveying: Theory and Practice. Philadelphia, Pa. : Lefax.
Atenció: Aquestes cites poden no estar 100% correctes.