Kavanagh, B. F., & Bird, S. J. G. (1996). Surveying: Principles and applications (4th ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Kavanagh, Barry F., agus S. J. Glenn Bird. Surveying: Principles and Applications. 4th ed. Englewood Cliffs, N.J: Prentice Hall, 1996.
Lua MLA (9ú heag.)Kavanagh, Barry F., agus S. J. Glenn Bird. Surveying: Principles and Applications. 4th ed. Prentice Hall, 1996.
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