Punmia, B. (1990). Surveying (9th ed.). Laxmi.
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Dyfyniad Arddull Chicago
Punmia, B.C. Surveying. 9th ed. New delhi: Laxmi, 1990.
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Dyfyniad MLA
Punmia, B.C. Surveying. 9th ed. Laxmi, 1990.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.