Dyfyniad APA

Pierce, F. J., & Clay, D. (2007). GIS applications in agriculture. CRC Press.

Dyfyniad Arddull Chicago

Pierce, Francis J., and David Clay. GIS Applications in Agriculture. Boca Raton: CRC Press, 2007.

Dyfyniad MLA

Pierce, Francis J., and David Clay. GIS Applications in Agriculture. CRC Press, 2007.

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