(2003). Guidelines for the use of GPS in surveying and mapping. RICS Books.
Dyfyniad Arddull ChicagoGuidelines for the Use of GPS in Surveying and Mapping. RICS Books, 2003.
Dyfyniad MLAGuidelines for the Use of GPS in Surveying and Mapping. RICS Books, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.