Clancy, J. (1991). Site Surveying and Levelling (2nd ed.). Routledge.
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Dyfyniad Arddull Chicago
Clancy, John. Site Surveying and Levelling. 2nd ed. New York: Routledge, 1991.
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Dyfyniad MLA
Clancy, John. Site Surveying and Levelling. 2nd ed. Routledge, 1991.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.