282642 Williamson, J. (1952). Surveying and field work: A practical text-book. London : Constable.
Lua i Stíl Chicago (17ú heag.)282642 Williamson, James. Surveying and Field Work: A Practical Text-book. London : Constable, 1952.
Lua MLA (9ú heag.)282642 Williamson, James. Surveying and Field Work: A Practical Text-book. London : Constable, 1952.
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