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Dyfyniad Arddull ChicagoMARSH, William M. Environmental Analysis: For Land Use and. New York: McGraw-Hill, 1978.
Dyfyniad MLAMARSH, William M. Environmental Analysis: For Land Use and. McGraw-Hill, 1978.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.